Journal of Materials Processing Technology最新文献_第9页

Optimizing L-DED repair of arc-shaped grooves via defocus control: Thermodynamic modeling and aspect ratio-defocus distance matching mechanism 圆弧形沟槽离焦控制优化L-DED修复：热力学建模与纵横比-离焦距离匹配机制

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-11 DOI: 10.1016/j.jmatprotec.2025.119147

Xianzhi Jin , Lei Wang , Zelin Zhang , Yuyao Guo , Xuhui Xia

{"title":"Optimizing L-DED repair of arc-shaped grooves via defocus control: Thermodynamic modeling and aspect ratio-defocus distance matching mechanism","authors":"Xianzhi Jin , Lei Wang , Zelin Zhang , Yuyao Guo , Xuhui Xia","doi":"10.1016/j.jmatprotec.2025.119147","DOIUrl":"10.1016/j.jmatprotec.2025.119147","url":null,"abstract":"<div><div>Laser Directed Energy Deposition (<span>L</span>-DED) has been widely employed in the repair of core components such as rolls, turbine blades, and bearings. However, when <span>L</span>-DED is directly applied to defect areas, geometric irregularities on the surface can lead to random and uneven distribution of laser energy, resulting in fluctuations in repair layer hardness, poor adhesion, and even secondary failures. Pre-machining suitably arc-shaped grooves in the defect areas and matching them with appropriate defocus parameters can regulate the laser energy distribution, serving as a key technical approach to enhance the stability of repair layer hardness and bonding quality. This study innovatively couples laser propagation, powder flow, and groove structure to establish a thermal-fluid-solid coupling model applicable to curved surfaces, quantifying the effects of positive/negative defocus modes on the powder flow field and heat transfer process in the molten pool. Furthermore, it reveals the influence mechanism of negative defocus on the temperature evolution of the molten pool in arc grooves and the deposition quality, establishing a quantitative matching relationship between arc grooves with different width-to-height ratio (D) and defocus distance (H). The results indicate that when the D = 2, the optimal H is −30 mm; when D = 2.5, it is −65 mm; and when D = 3 and 4, it is −85 mm. Through multi-physics simulations and experimental validation, it is demonstrated that the matching relationship between the D and the H of the arc groove can achieve a defect-free bonding interface after repair and stabilize the microhardness at 480–520 HV. This study provides a theoretical basis and process guidance for the <span>L</span>-DED repair of curved components, promoting the advancement of <span>L</span>-DED technology from planar/simple groove repairs to complex curved surface repairs.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119147"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527603","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}

引用次数: 0

Guidance for authors on contributions the JMPT considers out of scope 对JMPT认为超出范围的贡献的作者的指导

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-23 DOI: 10.1016/j.jmatprotec.2025.119161

Dragos Axinte

引用次数: 0

Metallurgical origin of dual-cracking mechanism in resistance spot welds of dissimilar aluminum alloys 异种铝合金电阻点焊双裂纹机制的冶金成因

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-17 DOI: 10.1016/j.jmatprotec.2025.119154

Yu-Xue Zhang , Hai-Long Jia , De-Ping Jiang , Yi-Hang Yang , Wei Liu , Xiao-Li Zhou , Min Zha , Wei He , Pin-Kui Ma

{"title":"Metallurgical origin of dual-cracking mechanism in resistance spot welds of dissimilar aluminum alloys","authors":"Yu-Xue Zhang , Hai-Long Jia , De-Ping Jiang , Yi-Hang Yang , Wei Liu , Xiao-Li Zhou , Min Zha , Wei He , Pin-Kui Ma","doi":"10.1016/j.jmatprotec.2025.119154","DOIUrl":"10.1016/j.jmatprotec.2025.119154","url":null,"abstract":"<div><div>This study investigates the fundamental mechanisms of solidification cracking in resistance spot welding (RSW) of dissimilar Al–Si/AA5182 alloys with unequal thicknesses. Two distinct cracking behaviors were identified. Unlike previous reports in which cracks predominantly occurred in the partially melted zone, this work reveals that Type I cracks form at the interface between the columnar grain zone (CGZ) and the equiaxed grain zone (EGZ). The asynchronous solidification of these two zones produces a solid-fraction disparity, concentrating thermal shrinkage stress. Simultaneously, the segregation of β-Al₃(Fe,Mn)Si₂ and Mg₂Si particles and the presence of low-melting eutectic films hinder liquid feeding, promoting intergranular cracking. By contrast, Type II cracks develop in the EGZ center under excessive heat input due to severe volumetric shrinkage and the blockage of interdendritic feeding channels, which rupture the remaining eutectic liquid films and generate internal hot cracks. Based on these findings, a dual-cracking mechanism is proposed to describe how thermal–metallurgical nonuniformity and feeding constraints govern crack initiation and propagation. This mechanistic framework provides a broader understanding of solidification cracking under asymmetric solidification conditions, extending beyond the specific Al–Si/Al–Mg system. The insights establish a scientific basis for defect suppression and process optimization in resistance spot welding and other rapid-solidification processes of lightweight alloys.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119154"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620999","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}

引用次数: 0

Tailoring single-crystal-like textures in a non-weldable Ni-based superalloy by controlling overlap behavior in laser powder bed fusion 通过控制激光粉末床熔合过程中的重叠行为，在不可焊接镍基高温合金中裁剪单晶状织构

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-07 DOI: 10.1016/j.jmatprotec.2025.119143

Fangxian Zhang , Chuanqiang Peng , Tao Zhu , Xinliang Xie , Liping Zhou , Yang Li , Qi Chao , Guohua Fan

{"title":"Tailoring single-crystal-like textures in a non-weldable Ni-based superalloy by controlling overlap behavior in laser powder bed fusion","authors":"Fangxian Zhang , Chuanqiang Peng , Tao Zhu , Xinliang Xie , Liping Zhou , Yang Li , Qi Chao , Guohua Fan","doi":"10.1016/j.jmatprotec.2025.119143","DOIUrl":"10.1016/j.jmatprotec.2025.119143","url":null,"abstract":"<div><div>Controlling the solidification behavior of Ni-based superalloys to achieve tailored crystallographic textures or single-crystal structures is essential for producing high-performance components for extreme-temperature applications. Additive manufacturing, particularly laser powder bed fusion (LPBF), offers unique capabilities for microstructural design. In this study, we present an overlapping-based strategy to produce single-crystal-like textures along arbitrary three-dimensional orientations in the non-weldable IN738LC superalloy via LPBF. By tuning melt pool geometry and overlapping rates- through adjustments in hatch space and layer thickness-we successfully engineered three distinct textures without altering scan strategy: < 001 > ∥building direction (BD), < 311 > ∥BD, and < 110 > ∥BD. The mechanisms driving texture development, including epitaxial growth and subsequent competitive grain selection, are analyzed using computational fluid dynamics simulations of the thermal field and temperature gradient distributions. This work provides a new pathway for fabricating single-crystal-like Ni-based superalloy components using LPBF, advancing the integration of texture control into additive manufacturing.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119143"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527657","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}

引用次数: 0

Effect of local crystallographic texture on near-surface residual stress variation in machined titanium 局部晶体织构对加工钛近表面残余应力变化的影响

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-14 DOI: 10.1016/j.jmatprotec.2025.119153

Akshay Mundayadan Chandroth , Nikhil Prabhu , Martin Diehl , Marc Seefeldt , Joris Everaerts

{"title":"Effect of local crystallographic texture on near-surface residual stress variation in machined titanium","authors":"Akshay Mundayadan Chandroth , Nikhil Prabhu , Martin Diehl , Marc Seefeldt , Joris Everaerts","doi":"10.1016/j.jmatprotec.2025.119153","DOIUrl":"10.1016/j.jmatprotec.2025.119153","url":null,"abstract":"<div><div>Machining of metals causes near-surface plastic deformation, inducing residual stresses that can significantly impact a component's performance. Since most metals are polycrystals these stresses are multiscale in nature. Most studies on machining-induced residual stresses focus on the macroscale, even though microscale stresses, which are more challenging to measure, can deviate significantly from the macroscale average. In this study, microscale residual stresses in annealed Ti-6Al-4V subjected to abrasive wheel cutting are quantified experimentally for the first time. Titanium is of particular interest for this study due to its strong crystallographic anisotropy and the presence of clusters of grains with similar orientation known as microtextured regions (MTRs). Via Focused Ion Beam - Digital Image Correlation ring-core measurements, it is shown that microscale residual stresses are present in the range of ±200 MPa prior to cutting. After cutting, in-plane near-surface residual stresses are found to be more compressive to depths of approximately 20 μm. Cutting also induces out-of-plane near-surface residual stresses, with large dispersion in both tension and compression. The sign of out-of-plane residual stresses is found to correlate with the MTR’s average elastic modulus. Crystal plasticity simulations confirm that elastic anisotropy affects residual stress development due to elastic recovery. Furthermore, lower compressive stress levels during loading combined with a higher elastic recovery promotes the formation of detrimental tensile residual stress in grains, particularly in those oriented for easy basal slip. Overall, this study illustrates the importance of investigating microscale residual stress variation in polycrystalline metals after machining, particularly for highly anisotropic metals.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119153"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577370","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}

引用次数: 0

Photocatalytic-assisted electrochemical drilling for passivation suppression in high-volume-fraction SiCp/Al composites 高体积分数SiCp/Al复合材料的光催化辅助电化学钻孔钝化抑制

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-07 DOI: 10.1016/j.jmatprotec.2025.119140

Jing Zhou , Long Cheng , Lijie Jiang , Xiaoka Wang , Feng Wang , Xiaoming Kang

{"title":"Photocatalytic-assisted electrochemical drilling for passivation suppression in high-volume-fraction SiCp/Al composites","authors":"Jing Zhou , Long Cheng , Lijie Jiang , Xiaoka Wang , Feng Wang , Xiaoming Kang","doi":"10.1016/j.jmatprotec.2025.119140","DOIUrl":"10.1016/j.jmatprotec.2025.119140","url":null,"abstract":"<div><div>High-volume-fraction silicon carbide particle-reinforced aluminum matrix composites (SiCp/Al) are widely used in integrated circuit applications due to their superior thermal and mechanical properties. However, the heterogeneous materials lead to localized passivation during electrochemical drilling, resulting in uneven dissolution and poor hole-profile accuracy. This study introduces a photocatalytic-assisted electrochemical drilling (PAECD) method for suppressing passivation, enhancing dissolution uniformity, and promoting the drilling process. Comprehensive investigations were conducted, including surface characterization analysis, polarization analysis and dissolution behavior assessment of this approach. The PAECD experiments were conducted under different voltages and feeding displacements, followed by through-hole drilling experiments to evaluate the applicability of the method in advanced machining of SiCp/Al composites. Experimental results reveal that photocatalyst addition enables more homogeneous dissolution by reducing oxide formation, suppressing passivation, and lowering the dissolution barrier. The PAECD process achieves a higher material removal rate and depth-to-diameter ratio. Consequently, the entrance overcut is minimized, the electrochemical reactions are effectively synchronized with the feeding motion, and the tool wear is significantly reduced. Furthermore, residual SiC particles at hole entrances are markedly diminished, local passivation is effectively suppressed, and vertical electrolyte circulation is enhanced. Compared with conventional electrochemical drilling, the PAECD process achieves a 27.63 % reduction in side clearance and an 8.33 % reduction in taper angle, yielding a smoother profile and more precise hole profiles of high-volume-fraction SiCp/Al composites.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119140"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464849","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}

引用次数: 0

Numerical and experimental study on spatter formation mechanisms and suppression method during ultra-high power laser-arc hybrid welding 超高功率激光-电弧复合焊接溅射形成机理及抑制方法的数值与实验研究

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-13 DOI: 10.1016/j.jmatprotec.2025.119151

Yan Li , Shaoning Geng , Yilin Wang , Chu Han , Shaoyun Song , Bangyan Xu

{"title":"Numerical and experimental study on spatter formation mechanisms and suppression method during ultra-high power laser-arc hybrid welding","authors":"Yan Li , Shaoning Geng , Yilin Wang , Chu Han , Shaoyun Song , Bangyan Xu","doi":"10.1016/j.jmatprotec.2025.119151","DOIUrl":"10.1016/j.jmatprotec.2025.119151","url":null,"abstract":"<div><div>Ultra-high power laser-arc hybrid welding (UH-LAHW, laser power ≥20 kW) provides an effective method for joining thick-walled components. However, under ultra-high power laser irradiation, intense keyhole-molten pool fluctuations lead to spatter formation, which remains a critical challenge hindering the industrial application of UH-LAHW. This study systematically investigates spatter formation and suppression mechanisms in UH-LAHW through combined experimental and simulation approaches. The intrinsic relationships among keyhole wall protrusion dynamics, molten pool oscillations, and spatter formation were analyzed. Results indicate that front keyhole wall (FKW) protrusions exhibit two distinct motion modes under laser irradiation: “melt-evaporation-displacement” and “melt-evaporation-evaporation”. The former is identified as the dominant mechanism driving rapid upward movement of liquid columns and spatter formation. Regulating the laser-to-arc energy ratio threshold (E<sub>L:A</sub>= 2.2:1–1.8:1) can reduce FKW protrusion volume, expand the keyhole opening, and decrease liquid column ejection height. This process culminated in the effective suppression of spatter at the optimal welding condition (E<sub>L:A</sub> = 2.0:1). This study presents an effective approach for spatter suppression and provides a theoretical foundation and data support for industrial application of UH-LAHW technology.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119151"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527604","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}

引用次数: 0

Effects of laser energy uniformization via static beam shaping on ablation behavior and mechanism of SiCf/SiC composites 静态光束整形激光能量均匀化对SiCf/SiC复合材料烧蚀行为及机理的影响

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-11 DOI: 10.1016/j.jmatprotec.2025.119149

Xintong Cai, Xin Qin, Jinbo Niu, Renke Kang, Zhigang Dong, Yan Bao, Guangyi Ma, Fangyong Niu

{"title":"Effects of laser energy uniformization via static beam shaping on ablation behavior and mechanism of SiCf/SiC composites","authors":"Xintong Cai, Xin Qin, Jinbo Niu, Renke Kang, Zhigang Dong, Yan Bao, Guangyi Ma, Fangyong Niu","doi":"10.1016/j.jmatprotec.2025.119149","DOIUrl":"10.1016/j.jmatprotec.2025.119149","url":null,"abstract":"<div><div>Laser assisted machining (LAM) is an effective method to solve difficult machining problem of Ceramic Matrix Composites (CMC), which includes laser pretreatment and subsequent mechanical machining. However, the commonly used Gaussian beam in pretreatment causes uneven evolution of material removal, thereby affecting machining process. To achieve a uniform machining effect, static beam shaping was used to study influence of energy uniformization on interaction between laser and SiC<sub>f</sub>/SiC in this paper, and ablation mechanism of circular Gaussian and rectangular uniform laser and growth mechanism of new SiC were explored. Under laser irradiation, CMC exists in two states: oxidation-modified and ablative-removal. In oxidation-modified state, there is transition zone with increased width at oxide layer edge under Gaussian laser, and subsurface crack propagation area is arc-shaped. Uniform laser generates oxide layer with relatively narrower edge transition zone and with uniform width, reducing crack region width and maintaining consistent distribution depth. In ablative-removal state, Gaussian laser forms semi-circular ablation grooves, recast layers and heat affected zones, and generates longitudinal extending cracks. Uniform laser forms flat-bottomed characteristic area. Cracks are suppressed and damage layer depth is reduced by 51.9 %. Under two beams, new 3C-SiC with face-centered cubic (FCC) structure and semi-coherent interface is generated in Si-rich phase. SiC is subjected to along heat dissipation and coarsen into columnar crystals. Uniform thermal expansion constraint forms SiC twin crystal under uniform laser. Therefore, uniform ablation effects of CMC can be obtained through beam shaping, and the results are expected to be applied in laser pretreatment of LAM.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119149"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527606","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}

引用次数: 0

An enhanced characteristic time-based heat input model for simulating laser heating in additive manufacturing 一种基于增强特征时间的增材制造激光加热模拟热输入模型

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-03 DOI: 10.1016/j.jmatprotec.2025.119129

Mahsa Heidari , Louis N.S. Chiu , Ming Liu , Aijun Huang , Bernard Rolfe , Wenyi Yan

{"title":"An enhanced characteristic time-based heat input model for simulating laser heating in additive manufacturing","authors":"Mahsa Heidari , Louis N.S. Chiu , Ming Liu , Aijun Huang , Bernard Rolfe , Wenyi Yan","doi":"10.1016/j.jmatprotec.2025.119129","DOIUrl":"10.1016/j.jmatprotec.2025.119129","url":null,"abstract":"<div><div>The Characteristic Time-Based Heat Input (CTI) model is an efficient agglomerated laser approach for simulating a heat source in additive manufacturing, significantly reducing computational costs while maintaining accuracy. In the CTI model, Goldak's moving heat source is applied to laser tracks using a characteristic heating time, based on the ratio of the heat source axis to the scanning speed. However, this characteristic heating time is valid only for material points along the central line of the deposited track, which may lead to applying inaccurate power density distribution at other points within the track. This study enhances the CTI model by reformulating the characteristic heating time through volume averaging the laser exposure time for all points within the semi-elliptical cylinder, achieving more precise temperature predictions while preserving computational efficiency. The improvements of the enhanced CTI (ECTI) model are evaluated through a comparative study with experimental data, the detailed Goldak model, and the original CTI model, focusing on laser-directed energy deposition (DED) of two Ti-6Al-4V components: a thin-wall and a cone. The refined characteristic heating time in the ECTI model demonstrates significant mitigation of temperature history deviation for DED (>7.6 % error reduction). The ECTI model shows close agreement with Goldak for residual stress predictions, validated experimentally using the contour method on the cone, and aligns well with experimental measurements of distortion. Additionally, the computational time for the ECTI model is only 23 % of that for the Goldak model in the thin-wall geometry and 19.3 % in the cone geometry.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119129"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448852","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}

引用次数: 0

Intralayer deposition mechanism of dissimilar materials by multi-material additive manufacturing based on laser powder-bed fusion 基于激光粉末床融合的多材料增材制造异种材料层内沉积机理

IF 7.5 2区材料科学

Journal of Materials Processing Technology Pub Date : 2026-01-01 Epub Date: 2025-11-29 DOI: 10.1016/j.jmatprotec.2025.119163

Yasong Shi , Taitong Jin , Jiawei Ding , Yong Wang , Wei Zhang , Yingbo Peng

{"title":"Intralayer deposition mechanism of dissimilar materials by multi-material additive manufacturing based on laser powder-bed fusion","authors":"Yasong Shi , Taitong Jin , Jiawei Ding , Yong Wang , Wei Zhang , Yingbo Peng","doi":"10.1016/j.jmatprotec.2025.119163","DOIUrl":"10.1016/j.jmatprotec.2025.119163","url":null,"abstract":"<div><div>The “layer-by-layer” processing nature of laser powder bed fusion (LPBF) presents challenges for the distribution of multi-materials in the horizontal direction, thereby limiting the design flexibility and functionality of multi-material components. In this study, a \"powder + entity\" interfacial processing model was proposed to achieve intralayer deposition of dissimilar materials via LPBF. In the intralayer deposited SS316L/FeCoCrNi high entropy alloy (HEA)-diamond composites dissimilar-material samples, there was no newly formed phase at the interface, which preserved the γ-austenite and HEA face-centered cubic (FCC) structures, with good interfacial metallurgical bonding. Thermal-fluid coupling simulations showed the asymmetric flow of the mixed molten pool caused by the combined effects of thermal/solute-induced Marangoni flow and gravity, influencing the solidification paths on both sides of the interface. SS316L side characterized by directional melt flow exhibited a preferential crystal-grow orientation that transitioned from < 111 > to < 101 > . Conversely, the composites side displayed anisotropic crystal growth with an increasing dislocation density due to local melt reflux. The interfacial bonding performance of the dissimilar-material samples achieved a yield strength of 430 MPa and a fracture strain of 28 %, attributed to substitutional solution strengthening and reduced dislocation density. This study not only proposes a strategy for achieving multi-material distribution perpendicular to building direction, but also provides new insights and theoretical complements regarding the molten pool behavior in LPBF.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"347 ","pages":"Article 119163"},"PeriodicalIF":7.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145690647","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}

引用次数: 0