Journal of Materials Processing Technology最新文献

{"title":"Effect of UV-illumination on electrochemical anodic oxidation of SiC","authors":"Zhenghao Wei ,&nbsp;Zhiyu Wang ,&nbsp;Huiqiang Liang ,&nbsp;Junqiang Li ,&nbsp;Jiongchong Fang ,&nbsp;Wenjun Lu ,&nbsp;Jiawen Zhang ,&nbsp;Haifeng Gao ,&nbsp;Zhongdu He ,&nbsp;Yu Guo ,&nbsp;Xu Sui ,&nbsp;Guosong Zeng","doi":"10.1016/j.jmatprotec.2024.118703","DOIUrl":"10.1016/j.jmatprotec.2024.118703","url":null,"abstract":"<div><div>Introducing an external energy field to force the oxidation of SiC is considered as an effective way to address the current challenge of chemical mechanical polishing (CMP) for SiC fabrication. In this study, we firstly compared several reported oxidation methods that have been used in different CMP-based techniques for SiC substrate, and demonstrated that the electrochemical (EC) and photoelectrochemical (PEC) anodic oxidations had significant advancement of the oxidation efficiency. Further comparison between EC and PEC revealed that PEC produced more uniform and smoother oxide layers in similar oxidation rates, while applied voltage and light intensity played a composing role in controlling the outcome. The quasi-in situ (photo)electrochemical atomic force microscopy analysis on the nanoindentation introduced artificial defects unraveled that, holes were prone to gather around the defective regions and resulted in faster oxidation rate, while the PEC can suppress such selective oxidation. These results suggest that the introduction of light has the potential to address the long-standing challenge of poor surface quality in electrochemical mechanical polishing (ECMP), not only for SiC but for various different semiconductor materials, and provide practical guidance for the industry to enhance PECMP performance on SiC and other hard and chemical inert semiconductor materials through optimizing oxidation processes.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118703"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168925","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":"Formation behavior of subcrystals and its strengthening and toughening mechanism by coupling with α phase in titanium alloys during forging at various temperatures","authors":"Shichen Sun ,&nbsp;Hongze Fang ,&nbsp;Jiaqi Hao ,&nbsp;Baohui Zhu ,&nbsp;Xianfei Ding ,&nbsp;Ruirun Chen","doi":"10.1016/j.jmatprotec.2024.118705","DOIUrl":"10.1016/j.jmatprotec.2024.118705","url":null,"abstract":"<div><div>Subgrain formation and its coupling with the α phase significantly improve the strength and toughness of titanium alloys. To elucidate the effect of temperature changes on the formation mechanism of nano-subgrains in Ti-6V-5Al-5Mo-5Cr-3Nb-2Zr-0.2Si alloy, multi-directional forging was conducted at various temperatures, and finally quantified the contribution of subgrains and phase evolution to mechanical properties. The results revealed that the equiaxed α phase precipitates at the β grain boundary. As the temperature rises, the aspect ratio of the α phase increases, while its content decreases. The formation mechanism of nano-subgrains during multi-directional forging at 690 ℃ involves dislocation accumulation and the separation of torsional bands within the β grains. When the temperature increases, the deformation resistance decreases, eliminating the need for crystal torsion to reduce this resistance. Subsequently, high-density dislocations form dislocation walls, which delineate the boundaries of fine nano-subgrains. This random orientation of subgrains significantly enhances both the strength and toughness of the titanium alloy forged at 770 ℃. Therefore, the tensile strength and fracture toughness of the alloy reach peak values of 1084.8 MPa and 54.18 MPa·m^1/2, respectively. Microstructural analysis of the cracks reveals that the nano-subgrains effectively hinder their rapid propagation. Due to the coupled strengthening effect of subgrains and α phases, the tensile strength and fracture toughness of the titanium alloy forged at 770 ℃ are increased by 26 % and 40 % respectively compared with the as-cast alloy.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118705"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168983","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":"Investigating the influence of biodegradable nanofluid process cooling on dynamic recrystallization and grain microstructure in friction stir welding of AA6082 alloy","authors":"Shubham Verma ,&nbsp;ChuanSong Wu ,&nbsp;Lalit Thakur ,&nbsp;Najib Ahmad Muhammad ,&nbsp;Shengli Li","doi":"10.1016/j.jmatprotec.2024.118700","DOIUrl":"10.1016/j.jmatprotec.2024.118700","url":null,"abstract":"<div><div>Heat generation during friction stir welding (FSW) significantly impacts heat-treatable aluminium alloy grain microstructure and precipitation behavior. Therefore, it is crucial to employ cooling techniques to reduce the excessive heat in the welding zone. Here, a new biodegradable nanofluid (comprising sunflower oil and copper oxide) process cooling was utilized to reduce the excess heat during the FSW of AA6082 alloy. Compressed air was mixed with the nanofluid, creating a mist spray known as minimum quantity lubrication (n-MQL), which was then sprayed onto the surface during FSW (i.e., n-MQL-FSW). A detailed comparative analysis of microstructure evolution and tensile behavior was performed on the FSW joints under normal and biodegradable process cooling conditions. A significant reduction in temperature was observed during n-MQL-FSW, and it also reduces asymmetrical heat transfer during welding. Additionally, the promotion of nucleation rate and growth of equiaxed grain occurs in the nugget zone (NZ), which dominates the continuous dynamic recrystallization (CDRX) during n-MQL-FSW. Moreover, the bulging frequency of high-angle grain boundaries (HAGBs) in NZ was also enhanced compared to FSW. The average grain size results of 25.81 ± 3.69 µm in the NZ were found for FSW observed in the shoulder-affected zone and then decreased to 21.36 ± 1.14 μm for n-MQL-FSW at the same position. Furthermore, the fraction of substructure in NZ was reduced, while the fraction of recrystallization was increased during the n-MQL-FSW. The tensile strength was ∼ 81 %, and ∼ 64 % of the BM was observed for n-MQL-FSW and FSW, respectively. The elongation percentage did not show any significant changes during both processes. This study reveals an efficient approach to reducing excess heat input during the FSW process to manufacture high-performance components.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118700"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169381","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":"Towards understanding the surface friction in rotational-vibration assisted incremental sheet forming","authors":"Zhidong Chang,&nbsp;Wenxuan Peng,&nbsp;Hui Long","doi":"10.1016/j.jmatprotec.2024.118692","DOIUrl":"10.1016/j.jmatprotec.2024.118692","url":null,"abstract":"<div><div>Incremental sheet forming (ISF), as a flexible sheet metal forming method, has attracted wide-spreading attention, however the dissatisfied surface quality has limited its adoption for potential industrial applications. There are insufficient studies in assessing the friction condition in ISF and it also lacks accurate methods for determining the coefficient of friction (CoF). Further investigations are required to understand fundamental mechanisms of the effect of friction condition on surface quality in ISF. In this study, it is found that the surface quality of sheet metal parts is considerably improved by rotational-vibration assisted ISF (RV-ISF) process under high-amplitude vibration. The improvement is considered to be attained by several underpinning mechanisms: the friction reduction under vibration, improvement of lubrication condition and increased surface micro-hardness. To investigate these mechanisms, two methods are proposed to evaluate the friction condition at the contact interface between the tool and sheet in ISF. The first method is a new calibration model for an accurate calculation of the CoF in ISF by excluding the effect of the horizontal forming force of the ISF tool. The second method is a novel analytical model in predicting the reduction of CoF under vibration in the RV-ISF. The friction prediction model is validated through experimental results when employing various rotational-vibration tools in processing three different materials. The results show that the forming procedure of “down-milling” is better than “up-milling” for improving the surface quality in RV-ISF. The vibration amplitude has the greatest effect on friction reduction, while other variables including non-vibrating frictional force, contact rigidity coefficient and tool radius also show significant effects on friction reduction. This study presents a significant advancement of friction research in ISF by developing two new friction models, offering new insights and effective methods to improve surface quality and accurately calculate the CoF under vibration effect.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118692"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169455","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":"The influence of deformation-dependent prior chip boundary on microstructure and tensile properties in a solid-state recycled AA6063 aluminum alloy","authors":"Yuanping Yu ,&nbsp;Xiuzhen Zhang ,&nbsp;Cong Wang ,&nbsp;Jiaqi Hu ,&nbsp;Dengshan Zhou ,&nbsp;Chao Yang ,&nbsp;Deliang Zhang","doi":"10.1016/j.jmatprotec.2024.118693","DOIUrl":"10.1016/j.jmatprotec.2024.118693","url":null,"abstract":"<div><div>Solid-state recycling that is devoid of metal melting process represents an energy-effective, environment-friendly and materials-saving way in producing sustainable aluminum (Al) materials from its scraps, and thereby is a promising solution in recycling of Al-based chips. On the recycling of Al-based chips by solid-state route, however, one major concern comes from the presence of prior chip boundaries which are expected to negatively influence the mechanical properties of recycled materials. In the current study, we examined prior chip boundaries in a solid-state recycled AA6063 Al alloy fabricated by extrusion of its machining chips, and found that samples taken from the edge and central regions of the extruded, artificially-aged rod exhibit drastically different oxide-decorated prior chip boundaries. The observed variations in oxide-decorated prior chip boundaries between the two locations are intimately linked to the shear strain encountered during the extrusion process. Adjacent to the edge region, a higher shear strain facilitates the fine dispersion of smaller oxides along the prior chip boundaries that are aligned with the extrusion direction. Conversely, in the central region, a reduced shear strain results in the coarse distribution of larger oxides fragments within the prior chip boundaries. As a result, the samples derived from the edge and central regions display essentially different grain structures, strain hardening effects, and fracture behaviors. Our results demonstrate deformation-controlled oxide-decorated prior chip boundaries in chip-based Al alloys, and their principal influence on recycled materials’ microstructures and tensile properties.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118693"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169457","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":"An integrated simulation approach for directing the texture control of austenitic stainless steel through laser beam powder bed fusion","authors":"Guanhong Chen ,&nbsp;Xiaowei Wang ,&nbsp;Xinyu Yang ,&nbsp;Xuqiong Yang ,&nbsp;Zhen Zhang ,&nbsp;Rongqing Dai ,&nbsp;Jiayuan Gu ,&nbsp;Tianyu Zhang ,&nbsp;Guiyi Wu ,&nbsp;Jianming Gong","doi":"10.1016/j.jmatprotec.2024.118707","DOIUrl":"10.1016/j.jmatprotec.2024.118707","url":null,"abstract":"<div><div>Laser Beam Powder Bed Fusion (PBF-LB) technology has demonstrated the capability to print products with unique properties by precisely controlling texture. However, understanding the mechanisms governing texture evolution and developing efficient control strategies remain significant challenges, particularly in inter-track texture control. This study addresses these gaps by proposing a novel simulation approach that integrates finite element modeling to track temperature changes and phase field modeling to simulate texture evolution. Through simulation, the inter-track remelting mechanism was revealed, fundamentally explaining texture evolution in PBF-LB and providing a new strategy for precise texture control. The results demonstrated that hatch distance, closely linked to the inter-track overlap ratio and texture type, is the most effective parameter for tailoring texture, unlocking new potential for inter-track texture modulation. This study marks the first use of phase field simulation to guide texture control in PBF-LB, offering a transformative understanding of texture evolution mechanisms. By validating the predictive capability and reliability of the developed simulation approach through experiments, this work provides a robust framework for optimizing texture control in additive manufacturing.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118707"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168492","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":"Optimizing bendability and hardness of age-hardenable aluminum sheets through local thermo-mechanical processing","authors":"Mert Efe,&nbsp;Kate Rader,&nbsp;Nicole Overman,&nbsp;Wahaz Nasim,&nbsp;Angel Ortiz,&nbsp;Ayoub Soulami,&nbsp;Kyoo Sil Choi","doi":"10.1016/j.jmatprotec.2024.118709","DOIUrl":"10.1016/j.jmatprotec.2024.118709","url":null,"abstract":"<div><div>This paper introduces a novel thermo-mechanical process to modify the local formability and hardness of 6xxx aluminum (Al−Mg−Si−Cu) alloy sheets in T4 and T6 tempers. In this process, two pairs of rollers travel along the length of a sheet while locally bending and unbending it so that the final shape and thickness of the sheet remains unchanged. It is possible to apply local deformation and/or heating with the process and control the properties separately. Room temperature bending/unbending (B/U) produces a deformation gradient through thickness and local hardening in both T4 and T6 sheets (with 38 % and 15 % greater Vickers hardness, respectively). High temperature B/U performed at ∼ 500 °C via induction heating, produces T4-temper-level bendability (bend angles of ∼ 150°) within the high temperature B/U processed zones of T6 sheets, without disturbing the T6 temper in the remainder of the sheet. T4 sheets benefit from the B/U deformation more than the T6 sheets, and the process offers increased local hardness of T4 sheets without significant loss in formability mainly due the heterogenous microstructure development and the weakened Cube texture through thickness. Individual control of local bendability and hardness in both tempers can enable downgauging and increase their usage in automotive applications.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118709"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168494","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":"Influence of diameter and scan strategy on the geometrical, microstructural, and mechanical properties of small Inconel 625 L-PBF struts","authors":"J. Rodrigues Da Silva ,&nbsp;Z. Hamouche ,&nbsp;A.-L. Helbert ,&nbsp;T. Baudin ,&nbsp;F. Coste ,&nbsp;P. Peyre","doi":"10.1016/j.jmatprotec.2024.118702","DOIUrl":"10.1016/j.jmatprotec.2024.118702","url":null,"abstract":"<div><div>The geometries, microstructures, and mechanical properties of vertically built Inconel 625 Laser Powder Bed Fusion (L-PBF) struts were investigated in this study. The influence of strut size (between 0.2 mm and 2 mm) and scan strategy was more specifically addressed. As-built struts exhibit satisfactory geometry and porosity rates, whatever the strut size and scan strategy. Classical columnar grains oriented parallel to the build direction (BD) were obtained, with a &lt; 001 &gt; // BD fiber texture only for the smaller struts (0.2 mm to 0.5 mm), due to the formation of a unique circular melt pool on the whole strut surface. At a smaller scale, the influence of the build strategy is also visible on solidification cells, whose average diameter decreases for outside-in strategies and larger hatching area ratios. The tensile strengths and hardness values are lower for the smaller diameter (0.3 mm) struts and for the inside-out strategies, suggesting the important role played by a finer sub-grain structure and a smaller crystallographic texture on the strengthening of Inconel 625 struts.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118702"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168496","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":"Achieving excellent superplasticity and predicting the elongations in ultrafine-grained Ti-4.5Al-3V-2Mo-2Fe titanium alloy prepared by friction stir processing","authors":"Peng Han,&nbsp;Wen Wang,&nbsp;Jingyu Deng,&nbsp;Ke Qiao,&nbsp;Kai Zhou,&nbsp;Jia Lin,&nbsp;Yuye Zhang,&nbsp;Fengming Qiang,&nbsp;Kuaishe Wang","doi":"10.1016/j.jmatprotec.2024.118701","DOIUrl":"10.1016/j.jmatprotec.2024.118701","url":null,"abstract":"<div><div>Titanium and its alloys hold significant industrial importance due to their potential for superplastic formability. However, most titanium and its alloys require high temperatures and low strain rates to achieve superplasticity. Friction stir processing, severe plastic deformation technology, offers an effective approach to achieve low-temperature or high-strain-rate superplasticity in fine-grained titanium alloys. Herein, the effect of rotation speed on the microstructure of the friction stir processed Ti-4.5Al-3V-2Mo-2Fe titanium alloy was investigated for the first time. An ultra-fine-grained Ti-4.5Al-3V-2Mo-2Fe titanium alloy was achieved, exhibiting an average grain size of only 0.26 μm at a rotation speed of 100 r/min and a processing speed of 80 mm/min. Subsequently, the superplastic tensile tests were conducted at temperatures ranging from 550°C-800°C, at an interval of 50°C, and strain rates of 3 × 10⁻⁴ s⁻¹, 1 × 10⁻³ s⁻¹, 3 × 10⁻³ s⁻¹, and 1 × 10⁻² s⁻¹, respectively. The results demonstrated that the ultrafine-grained titanium alloy exhibited excellent superplasticity, achieving an elongation of 1808 ± 52 % at 650°C and 3 × 10⁻³ s⁻¹. This large elongation was the highest reported value in the field of severe plastic deformed titanium alloys. The superior superplasticity was attributed to the fine grains (＜2 μm), a relatively high proportion of β phase (∼20 %), and a high proportion of high-angle grain boundaries (＞80 %) in the α and β phases during superplastic deformation. The primary superplastic deformation mechanism included dislocation slip and grain rotation coordinated with α/α, β/β grain boundary sliding, and α/β phase boundary sliding. Finally, a model correlating temperature, strain rate, and superplastic elongations was developed using backpropagation neural networks and support vector regression algorithms. The correlation coefficient between the predicted and the actual values was higher for support vector regression (0.93) compared to backpropagation neural networks (0.81), indicating that support vector regression was more suitable for predicting the superplastic elongations. This study offers a novel method for achieving superplasticity in SP700 titanium alloy components.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118701"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169451","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":"Fabrication and mechanical properties of the NiAl sheet with a 3-dimensional network structure prepared by Ni nets and Al foils","authors":"Zhubin He ,&nbsp;Yi Xu ,&nbsp;Bingao Wang ,&nbsp;Gaoning Tian ,&nbsp;Haimin Zhang","doi":"10.1016/j.jmatprotec.2024.118680","DOIUrl":"10.1016/j.jmatprotec.2024.118680","url":null,"abstract":"<div><div>Due to the inherent brittleness of lightweight NiAl alloys, conventional manufacturing methods are inadequate for producing large-sized NiAl sheets with excellent mechanical properties. This paper presents an alternative approach, employing Ni nets and Al foils as raw materials to fabricate a NiAl sheet via hot-press sintering in a vacuum furnace. The sheet exhibited a three-dimensional network structure, wherein small-sized grains enveloping larger grains within the net. The network structure is controlled by Ni nets used and the sintering parameters. A nearly fully dense sheet with a density of 99.98 % and a thickness of 1 mm was achieved under sintering conditions of 1400 ℃/20 MPa/0 min. The hardness distribution within the NiAl sheet exhibited a three-dimensional wavy surface profile with distinct peaks and valleys. The hardness in the high-hardness regions exceeded 600 HV0.05, while the hardness in the low-hardness regions ranged from 500 to 550 HV0.05. Tensile test results indicate that, at an initial strain rate of 0.001, the NiAl sheet exhibits brittle fracture at 900 °C, while displaying ductile fracture behavior at 950 °C and 1000 °C. The ultimate tensile strength exceeds 100 MPa at 900 °C but declines sharply as the deformation temperature increases. During tensile testing, cracks propagate along the fine-grain regions, and the fracture surface exhibits a multi-peak morphology. The study provides a new method for the preparation of heterogeneous NiAl alloy sheets and provides new ideas for the microstructure design and performance optimization of NiAl alloys.</div></div>","PeriodicalId":367,"journal":{"name":"Journal of Materials Processing Technology","volume":"336 ","pages":"Article 118680"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168416","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}