Journal of Materials Processing Technology最新文献

{"title":"A double ignition strategy for enhanced efficiency in atmospheric plasma machining","authors":"Junqi Zhang ,&nbsp;Zhixian Chen ,&nbsp;Zejin Zhan ,&nbsp;Yongjie Zhang ,&nbsp;Bing Wu ,&nbsp;Yinhui Wang ,&nbsp;Hui Deng","doi":"10.1016/j.jmatprotec.2025.118746","DOIUrl":"10.1016/j.jmatprotec.2025.118746","url":null,"abstract":"<div><div>Due to the advantages of high efficiency, low cost and versatile operation, atmospheric plasma machining has drawn significant attention in the field of semiconductor and optical fabrication. Nevertheless, for conventional atmospheric plasma machining sources feature low temperature, the machining efficiency is limited due to the low gas ionization rate. This paper presents a novel double ignition strategy based on coupled coupling plasma (CCP) for enhanced radical concentration and machining efficiency. The double ignition plasma jet (DIPJ) enhances electron concentration and promotes the dissociation of fluorine radicals compared to single ignition plasma jet (SIPJ), exhibiting higher removal efficiency. Afterwards, the jet characteristics are significantly affected by regulating the electric field distribution of DIPJ through adjusting the structural parameters, which further promotes the ignition strength and radical generation. With the optimization of ignition configuration and process parameters, a Gaussian removal function can be obtained and the material removal rate (MRR) can be reached over 0.4 mm³/min at a full width at half maximum (FWHM) of 4.8 mm. The form error of a 100 × 50 mm² Si planar mirror can be reduced from 150.41 nm to 19.36 nm RMS within 7.9 min after one iteration of figuring, which demonstrates the high processing efficiency optical manufacturing.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118746"},"PeriodicalIF":6.7,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of grinding temperature theory and measurement for the needs of the times: Promoting the development of advanced manufacturing","authors":"Pengcheng Zhao ,&nbsp;Bin Lin ,&nbsp;Jingguo Zhou ,&nbsp;Bingrui Lv ,&nbsp;Jinming Li ,&nbsp;Jinshuo Zhang ,&nbsp;Longfei Wang ,&nbsp;Tianyi Sui","doi":"10.1016/j.jmatprotec.2025.118744","DOIUrl":"10.1016/j.jmatprotec.2025.118744","url":null,"abstract":"<div><div>Green and intelligent manufacturing has become a key development trend in the industrial sector. Grinding as a widely used machining process, advancing towards greener and smarter practices. Grinding generates significant heat, which critically affects the processed material. Therefore, accurately measuring and controlling the grinding temperature has become increasingly important. Various principles and numerous grinding temperature models have been proposed to address this challenge. This review provides a comprehensive analysis of the development of grinding temperature measurement technologies, tracing their evolution from traditional methods to modern techniques, and from foundational principles to practical applications. It elaborates on diverse measurement methods, including direct and indirect techniques, and compares these methods in terms of measurement accuracy, response speed, application scope, and operational complexity. The advantages and limitations of each technology are highlighted. Additionally, the key factors influencing the accuracy of grinding temperature measurements are discussed, along with strategies to address the shortcomings of existing methods through technological innovation. This review consolidates existing research and proposes directions for future advancements in grinding temperature measurement technologies to support intelligent manufacturing and high-performance manufacturing.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118744"},"PeriodicalIF":6.7,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Achieving high-quality copper alloy to nickel-based superalloy joint by isostatic high-pressure solid-state diffusion bonding","authors":"Dexin Zhang,&nbsp;Yi Xiao,&nbsp;Can Li,&nbsp;Tianwen Zhao,&nbsp;Huiqiao Du,&nbsp;Yong Li","doi":"10.1016/j.jmatprotec.2025.118747","DOIUrl":"10.1016/j.jmatprotec.2025.118747","url":null,"abstract":"<div><div>The high-performance joining of copper alloy and nickel-based superalloy to achieve high wear resistance, thermal conductivity and stiffness in the same structure is attracting increasing interest in various industries. However, directly joining to obtain high-quality joints of these two dissimilar materials is a challenge due to the significant differences in physical and chemical properties. In this study, a novel solid-state diffusion bonding method by employing isostatic high pressure has been proposed. The process parameters are optimized to achieve high-quality joints of a new material system (CuAgZn and GH600). The effects of bonding temperatures on microstructure evolution and mechanical properties at the joints under high-pressure conditions have been systematically investigated. The results show that reliable metallurgical joints, free of defects, have been successfully obtained under high isostatic pressure of 170 MPa, and some solid solution and precipitated phases have formed at the interface. The joint has exhibited a maximum tensile strength of 280.9 MPa (about 80 % of the copper alloy) with the bonding temperature of 660 °C. All the joints fractured adjacent to CuAgZn and exhibited brittle fracture features with ductile characteristics after tensile tests. Solution strengthening, precipitation strengthening, and recrystallization softening have been explained as the main mechanisms for the good joint strength. This study provides an effective strategy for achieving high-quality joints by isostatic high-pressure diffusion bonding for dissimilar materials.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118747"},"PeriodicalIF":6.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grain structure and microstructural properties of 2139 Al alloy based on additive units ordering stack via wire-arc directed energy deposition","authors":"Xiaowei Wang ,&nbsp;Zhaoyang Yan ,&nbsp;Tao Zhao ,&nbsp;Yu Dong ,&nbsp;Shujun Chen ,&nbsp;Huijun Li","doi":"10.1016/j.jmatprotec.2025.118742","DOIUrl":"10.1016/j.jmatprotec.2025.118742","url":null,"abstract":"<div><div>In this study, the heat and mass transfer processes of wire-arc directed energy deposition were investigated by introducing the concept of the additive units ordering stack. The relationship between the process parameters and formed dimensions was used to accurately predict the critical height of thermal equilibrium and establish process schemes to achieve thermal balance. A 2319 Al alloy part having fully equiaxed grains was fabricated. The impact of thermal equilibrium on the forming precision, microstructure, and mechanical properties was examined. After thermal equilibrium was achieved, the dimensions of the deposited layers stabilized, with a volumetric removal rate indicating a forming accuracy of 0.22 %, which was significantly better than the accuracy of 3.02 % achieved in non-equilibrium zones. The porosity-distribution density decreased, and the average hardness values exhibited a low standard deviation of approximately ±5.46 HV_0.2. Thermal-equilibrium conditions optimized the mushy zone, leading to a uniform equiaxed microstructure with an average grain size of 44.2 μm and minimal size deviation between adjacent axial grains. Thermal equilibrium mitigated the effects of temperature differences on Cu atom diffusion, enhanced the microstructural uniformity, and achieved a tensile-strength consistency of 99.4 % in all directions, with average tensile strengths of 182.3 ± 0.9 and 183.33 ± 1.3 MPa in the transverse and longitudinal directions, respectively. This approach represents a fundamental advancement in achieving thermal equilibrium during the deposition process, offering new insights for improving forming accuracy and performance anisotropy.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118742"},"PeriodicalIF":6.7,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adaptive diamond texturing of micro/nano-structured surfaces enabled by hybrid control of 2D tool position and cutting force","authors":"Yang Yang,&nbsp;Han Pan,&nbsp;Yuchao Bai,&nbsp;Yingxue Yao","doi":"10.1016/j.jmatprotec.2025.118739","DOIUrl":"10.1016/j.jmatprotec.2025.118739","url":null,"abstract":"<div><div>Vibration-assisted diamond texturing (VADT) has recently gained prominence as an effective method for producing micro- and nanostructured functional surfaces, offering considerable application potential. Despite its advantages, the accuracy of surface formation in VADT, governed by the replication of cutting trajectories, must contend with the unavoidable inaccuracies inherent in the manufacturing systems. To address this issue and enhance the process robustness, this paper firstly proposes a novel adaptive diamond texturing approach that integrates a hybrid control of the 2D tool position and cutting force to precisely track the desired material removal state. A bidirectional mapping relationship between the actual cutting trajectory and dynamic cutting force has been established, enabling real-time decoupling of the transient material removal state. Furthermore, an objective function for optimal 2D tool compensation displacement has been analytically defined to track the desired cutting force and surface topography adaptively. Experimental validations conducted on freeform and inclined surfaces demonstrate the high consistency of the textured microstructures and precise tracking of the desired material removal state and 2D cutting force. Additionally, this paper highlights the superiority of the proposed hybrid control approach over conventional tool position-based and thrust force-based servo controls. This study advances the scientific understandings of the surface formation principle and the significant impacts of tool servo position and machining system errors on dynamic cutting force in VADT processes. It also explores the potential of force servo-based control methodologies to enhance process robustness, independent of manufacturing system errors and the characteristics of cutting force.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118739"},"PeriodicalIF":6.7,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the viability of in-situ alloying via process gas mixtures in wire arc directed energy deposition of austenitic stainless steel","authors":"Florian Pixner ,&nbsp;Aurel Arnoldt ,&nbsp;Michael Unger ,&nbsp;Christian Schneider-Bröskamp ,&nbsp;Kamalesh Bharadwaj ,&nbsp;Florian Mayrhofer ,&nbsp;Rudolf Gradinger ,&nbsp;Thomas Klein","doi":"10.1016/j.jmatprotec.2025.118738","DOIUrl":"10.1016/j.jmatprotec.2025.118738","url":null,"abstract":"<div><div>Additively manufactured stainless steel structures are produced under different shielding gas atmospheres, namely inert argon blended with variants in the composition of nitrogen and helium. The present study investigates the concept of in-situ interstitial nitrogen alloying via the shielding gas atmosphere in arc- and wire-based directed energy deposition of austenitic chromium-nickel stainless steel. A comparable deposition- and build-up characteristic was observed for all deposits, irrespective of the shielding gas used. A slight increase in spatter formation and a marginal reduction in average layer height was observed when the helium content was increased. The chemical composition of the deposits can be actively influenced by the shielding gas atmosphere: Addition of nitrogen to the shielding gas atmosphere directly increases the nitrogen content in the deposits produced and thus changes the microstructure and the corresponding mechanical properties. With increasing nitrogen content, the primary solidification mode changes from ferritic-austenitic to austenitic-ferritic to almost pure austenite. Deposits fabricated with pure argon inert gas atmosphere show a dual-phase microstructure with a considerable amount of vermicular delta-ferrite embedded in the secondary austenitic-matrix, while the addition of nitrogen changes the microstructure to primary columnar/cellular grown austenite dendrites with lath-shaped secondary delta-ferrite embedded in the interdendritic zones; the proportion of lath-shaped delta-ferrite decreases with increasing nitrogen content. Helium addition to the nitrogen in the shielding atmosphere leads to a further refinement of the columnar/cellular grown primary austenite dendrites. The changes in the chemical composition and microstructure are also reflected in the associated mechanical properties. In-situ alloying of nitrogen acts as interstitial solid solution strengthening and increases the tensile strength, the strain-hardening rate, though reduces the fracture strain compared to deposits produced under pure argon atmosphere. By adding helium and due to its refining effect, the fracture strain can be fully recovered. Nevertheless, the strengthening effect of nitrogen is also limited, and excessive nitrogen alloying and interstitial solid solution strengthening leads to premature failure and fully brittle fracture of the excessively nitrogen alloyed specimens.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118738"},"PeriodicalIF":6.7,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of grain morphology on the chip formation mechanisms of wrought and laser powder bed fusion (LPBF) fabricated alloy 718","authors":"Lingshan Li ,&nbsp;Shusong Zan ,&nbsp;Zhirong Liao ,&nbsp;Hao Chen ,&nbsp;Dragos Axinte","doi":"10.1016/j.jmatprotec.2025.118740","DOIUrl":"10.1016/j.jmatprotec.2025.118740","url":null,"abstract":"<div><div>Understanding the role of grain morphology in the chip formation mechanism during orthogonal cutting is crucial to achieve reliable surface integrity. This is especially important when machining additively manufactured alloys due to the inherent presence of crystallographic textures from their unique grain growth patterns. In this work, wrought and laser powder bed fusion (LPBF) fabricated Alloy 718, representing equiaxed and elongated grains respectively, were employed as the case studies to investigate the influence of grain morphology on the chip formation. A new customised Quick-Stop module was designed for a pendulum-based cutting device to retain the chip on the workpiece. This approach allows the characterisation of oriented grain deformation and quantification of texture evolutions from the workpiece to the chip. By retaining deformed grains near the primary shear zone, it was found that the elongated grains in LPBF-fabricated Alloy 718 significantly influenced the material pile-up behaviour along the shear direction when compared with the equiaxed grains in the wrought sample, leading to an increase in shear angle and decrease in chip ratio. This is because the transition of shear deformation from the cutting edge to free surface is hindered by long grain boundaries that are perpendicular to the cutting direction. Since the shear bands are hard to cross long grain boundaries, the deformation is governed by grain boundary bending in the primary shear zone. In addition, it is revealed that the original textures in the wrought and LPBF-fabricated Alloy 718 tend to evolve into A-type and C-type shear textures respectively during chip formation. This indicates that the slip system family {111}&lt; 112 &gt; is easier to be activated in wrought 718 but &lt; 110 &gt; -directional slip is dominated in LPBF-fabricated 718.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118740"},"PeriodicalIF":6.7,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Significantly improving mechanical properties of ultra-high strength steel joints via optimal in-situ post-weld heat treatment","authors":"Junliang Xue ,&nbsp;Yongxin Zhang ,&nbsp;Wei Guo ,&nbsp;Mingsheng Xia ,&nbsp;Jiaxin Shi ,&nbsp;Guang Zhao ,&nbsp;Qiang Jia ,&nbsp;Hongqiang Zhang","doi":"10.1016/j.jmatprotec.2025.118741","DOIUrl":"10.1016/j.jmatprotec.2025.118741","url":null,"abstract":"<div><div>By applying optimal <em>in-situ</em> post-weld heat treatment (PWHT), <em>in-situ</em> austenitization was achieved in the fusion line (FL) of ultra-high strength steel (2 GPa steel, tensile strength exceeding 2000 MPa) resistance spot welding (RSW) joint, and mechanical properties of the joint were significantly improved. In the fusion line of 7 kA weldment without <em>in-situ</em> post-weld heat treatment, the presence of a C-poor zone led to the formation of fine-lath γ-austenite and a decrease in dislocation density, resulting in the “hard-soft-hard” sandwich structure. The cracks of the 7 kA weldment propagated along the fusion line. The maximum force of 7 kA weldment was only 12.8 kN. The optimal <em>in-situ</em> post-weld heat treatment parameter (6 kA + 2 s) caused the re-partitioning of the C element and the formation of full martensite in the original fusion line, eliminating the “hard-soft-hard” sandwich structure. Consequently, the crack in 7 kA-(6 kA + 2 s) weldment no longer propagated along the fusion line. The maximum force of 7 kA-(6 kA + 2 s) weldment reached 22.2 kN. The efficient, accurate and optimal post-weld heat treatment process can eliminate element segregation and change the microstructure in the fusion line of ultra-high strength steels resistance spot welding joints, thereby altering the crack propagation path and significantly enhancing the mechanical properties of the joints.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118741"},"PeriodicalIF":6.7,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of closed-loop coaxial melt pool temperature control on thermal history and microstructure of nickel alloy 718 in directed energy deposition","authors":"Samantha Webster ,&nbsp;Jihoon Jeong ,&nbsp;Jon-Erik Mogonye ,&nbsp;James Zuback ,&nbsp;Shuheng Liao ,&nbsp;Julian Rocher ,&nbsp;Kornel Ehmann ,&nbsp;Jian Cao","doi":"10.1016/j.jmatprotec.2025.118725","DOIUrl":"10.1016/j.jmatprotec.2025.118725","url":null,"abstract":"<div><div>Advanced materials, better control methods, and unique toolpath planning strategies have recently been enabled through development of novel, in situ monitoring techniques in laser powder-blown directed energy deposition (DED-LB). Specifically, closed-loop control schemes have benefitted from development of in situ monitoring techniques focused on melt pool measurements and control. Implemented closed-loop control algorithms have heavily focused on modulating laser power to influence melt pool size or temperature. While demonstration of controller performance is readily available, there are limited studies addressing the effect of local closed-loop melt pool control on bulk component temperature history, re-heating of previous layers, and resulting material structures. In this study, coaxial photodiodes were implemented as a functioning two-color pyrometer. The photodiodes were used in closed-loop control to maintain a melt pool temperature of 1500 °C in a multi-layered thin wall deposited with Nickel alloy 718 (IN718). A thermal history analysis using concurrent infrared (IR) imaging showed that local melt pool control mitigated heat accumulation and improved the uniformity of spatial thermal gradients. In situ heat treatment times relevant to IN718 were quantified, and it was demonstrated that local melt pool control minimized time spent in solidification. Subsequent microstructure analysis demonstrated that the dominant mechanism for smaller grain formation with laser power modulation was the inhibition of epitaxial growth coupled with a change in local thermal gradient rather than a change in local cooling rate for IN718. Grain morphology and size were more uniform and three times as many small grains were present when local melt pool control was used, but primary dendrite size and Laves particle characteristics largely remained the same. It is ultimately shown that future designs of controllers in DED-LB must consider microstructure evolution of the working material system to fully realize improved mechanical properties and higher quality materials in DED-LB.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118725"},"PeriodicalIF":6.7,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Material removal mechanism and surface quality in low-fluence femtosecond laser ablation of polycrystalline diamonds","authors":"Guangxian Li ,&nbsp;Ruiguang Fan ,&nbsp;Yu Long ,&nbsp;Zhukun Zhou ,&nbsp;Songlin Ding","doi":"10.1016/j.jmatprotec.2025.118731","DOIUrl":"10.1016/j.jmatprotec.2025.118731","url":null,"abstract":"<div><div>Polycrystalline diamond (PCD) tools are extensively used in industry due to their ultrahigh hardness. Femtosecond laser ablation (FLA) has emerged as a promising method for precision applications such as the fabrication of micro/nano structures on the ultrahard tool surface. The distinct material removal mechanisms of PCD caused by the synthesized cobalt in polycrystalline structure influences the significance of plasma and plume shielding effects, eventually the machining efficiency and surface finish. To reveal the fundamental principle of how PCD’s microstructure affects material removal process, this paper presents a comprehensive study on the low-fluence FLA of PCD materials with different grain sizes and Co distribution. Evolution of plasma is visualized by the ultrafast imaging technique, and shielding effects are reflected by dynamic luminance of the recombined plasma. Effects of plume shielding at different repetition frequencies and scanning passes are characterized via acoustic emission sensing. A modified two-temperature model is developed to quantify energy absorption and thermal effects at different FLA conditions. It is revealed that microstructure of PCD determines the plasma generated by prior ablation of Co and shielding energy transferred to diamond lattice at different fluences; machining efficiency at different repetition frequencies is predominantly governed by the extent of plume shielding and plasma heating, regardless of the PCDs’ microstructure. This study establishes a direct correlation between laser parameters and shielding effects, and provides theoretical insights for the high-quality, high-efficiency fabrication of small-scale structures on ultrahard materials.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"337 ","pages":"Article 118731"},"PeriodicalIF":6.7,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}