{"title":"Effects of Conventional and Severe Shot Peening on Surface Integrity and Fatigue Behavior of Selective Laser Melting-Fabricated Ti-6Al-4V Alloy","authors":"Simge Gencalp Irizalp, Cansu Apaydin","doi":"10.1007/s11665-026-14262-7","DOIUrl":"10.1007/s11665-026-14262-7","url":null,"abstract":"<div><p>Selective Laser Melting (SLM)-fabricated Ti-6Al-4V alloys often contain defects such as porosity, high surface roughness, and tensile residual stresses, which limit their fatigue performance. This study investigates the effects of conventional (CSP, 11 N) and severe (SSP, 18 N) shot peening on the surface integrity and fatigue behavior of polished SLM specimens. Surface morphology, microstructure, x-ray diffraction (XRD) peak broadening, microhardness profiles, and tensile–tensile fatigue performance were examined. Both CSP and SSP enabled partial closure of surface-connected pores and refinement of α′ martensitic laths, increasing near-surface dislocation density. Surface microhardness increased by 17% after CSP and 40% after SSP, while the FWHM of the α′(101) peak increased by 122% and 137%, indicating enhanced lattice strain. The fatigue limit rose from 132 MPa to 200 MPa for both treatments, with SSP providing ~ 70% longer life at 230 MPa. Overall, SSP demonstrated superior effectiveness in improving microstructure and fatigue resistance.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38925 - 38942"},"PeriodicalIF":2.6,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Melika Tahmasebi, Milad Bahamirian, Mohammad Farvizi
{"title":"Tailored Multi-component Rare Earth Zirconate: Precise Control of Fluorite-to-Pyrochlore Phase Transition during Calcination","authors":"Melika Tahmasebi, Milad Bahamirian, Mohammad Farvizi","doi":"10.1007/s11665-026-14662-9","DOIUrl":"10.1007/s11665-026-14662-9","url":null,"abstract":"<div><p>This study demonstrates precise control overnon the fluorite-to-pyrochlore phase transition in (La<sub>x</sub>Gd<sub>1−x</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> (<i>x</i> = 0-1) through tailored rare-earth (RE) site engineering. Non-equimolar compositions, particularly <i>x</i> = 0.3 and <i>x</i> = 0.6, exhibit optimized size disorder (<i>δ</i> = 0.0341 and 0.0356, respectively) and configurational entropy (Δ<i>S</i><sub>conf</sub> = 5.08 and 5.597 J/mol·K, respectively), which results in exceptional sintering resistance and 40‐50% lower grain growth (38‐43 nm compared with 54‐93 nm in single-cation (<i>x</i> = 0 and <i>x</i> = 1) systems) after 50 h at 1300 °C. Structural analyses confirm systematic phase evolution: defective fluorite dominates at <i>x</i> = 0, ordered pyrochlore forms at <i>x</i> = 1, and stable dual-phase structures persist at intermediate compositions (<i>x</i> = 0.3, 0.6) under prolonged heating. Raman spectroscopy verifies enhanced cation ordering with increasing La content, while XRD/FESEM validate suppressed crystallite growth and phase purity. These findings establish non-equimolar RE-site engineering as a critical strategy for next-generation thermal barrier coatings, delivering 2X enhanced sintering resistance and operational stability in extreme environments.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38747 - 38764"},"PeriodicalIF":2.6,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Atte Antikainen, Joni Reijonen, Juha Lagerbom, Pasi Peura, Tomi Lindroos
{"title":"The Effect of Stress Relieving Temperature on Mechanical Properties, Residual Stresses and Lattice Parameter Evolution of L-PBF High-Carbon Tool Steel D2","authors":"Atte Antikainen, Joni Reijonen, Juha Lagerbom, Pasi Peura, Tomi Lindroos","doi":"10.1007/s11665-026-14539-x","DOIUrl":"10.1007/s11665-026-14539-x","url":null,"abstract":"<div><p>Laser powder bed fusion of tool steel D2 was done with 360 °C platform preheating. Industrially relevant sized (d9 X L51 mm cylinders) samples were printed without cracking and heat-treated at 550, 600 and 650 °C for two hours. Hardness and residual stress profiles along the sample length, tensile properties and fracture surfaces are presented. A thorough x-ray diffraction analysis revealed M7C3 carbides emerging during heat treatments. The carbides were concluded to be at least partially coherent with the BCC phase based on the lattice parameter changes in the BCC phase. Maximum hardness of 625 HV1, yield strength of 1441 MPa and tensile strength of 1813 MPa were achieved after 2 h stress relieving at 600 °C. Fracture surfaces revealed tensile cracks propagating through distinct areas in the melt pool. Residual stress measurements showed almost 800 MPa tensile stresses in the as-manufactured sample. Residual stresses were measured for a dual-phase sample annealed for 2 h at 550 °C showing over 600 MPa residual tensile stress in FCC and 140 MPa residual tensile stress on the BCC phase. The results show high-carbon tool steel being manufacturable with L-PBF and that the extremely high residual stresses can be relieved with a relatively low-temperature tempering.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38722 - 38733"},"PeriodicalIF":2.6,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11665-026-14539-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Effect of Feedstock Preparation on the Performance of Laser Powder Bed Fused TiN/AISI 420 Composites","authors":"Duc Tran, Jeng-Rong Ho, Huu-Nhan Tran, Quang-Lam Tran","doi":"10.1007/s11665-026-14330-y","DOIUrl":"10.1007/s11665-026-14330-y","url":null,"abstract":"<div><p>Metal matrix composites (MMCs) reinforced with a low volume fraction of ceramic particles can achieve superior properties when produced by laser powder bed fusion (LPBF, also known as selective laser melting, SLM). A key challenge, however, is preparing feedstock with uniform reinforcement dispersion and minimal contamination. This work systematically compares three powder-mixing routes—rolling, tumbling, and a hybrid wet-mixing process—to fabricate LPBF TiN/AISI 420 composites containing 1 wt.% TiN and 99 wt.% AISI 420. We evaluate powder morphology, surface quality, relative density, microstructure, hardness, tensile behavior, and corrosion resistance. Rolling led to pronounced TiN agglomeration, while tumbling introduced surface contamination of the steel matrix, and both degraded build quality and properties. In contrast, the hybrid wet-mixing route (ultrasonic dispersion in hexane followed by mechanical stirring and solvent removal) yielded the most uniform powder with minimal agglomeration. LPBF specimens prepared from the hybrid route achieved the best overall performance: surface roughness S<sub>a</sub> = 4.6 ± 0.3 µm, relative density 99.4 ± 0.2%, hardness 720 ± 12 HV, tensile strength 1779 ± 50 MPa with elongation 6.1 ± 0.3%, and a 48 h FeCl<sub>3</sub> corrosion rate of 112.6 ± 0.6 mm/year. These results demonstrate that careful feedstock preparation is essential to exploit the benefits of ceramic reinforcement in LPBF stainless-steel MMCs.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38915 - 38924"},"PeriodicalIF":2.6,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Junaid Shahzad, Muhammad Zubair, Furqan Ahmed, Wai Yie Leong, Qamar Hayat, Anand Mohan, Muhammad Salman Habib, Muhammad Asif Rafiq
{"title":"Effect of Laser Beam Oscillation on Weld Integrity and Mechanical Properties of Dissimilar Aluminum Alloys","authors":"Junaid Shahzad, Muhammad Zubair, Furqan Ahmed, Wai Yie Leong, Qamar Hayat, Anand Mohan, Muhammad Salman Habib, Muhammad Asif Rafiq","doi":"10.1007/s11665-026-14520-8","DOIUrl":"10.1007/s11665-026-14520-8","url":null,"abstract":"<div><p>The present study investigates the effects of laser beam oscillation on the integrity and mechanical behavior of the weld joint by combining both experimental and numerical methodologies for the dissimilar aluminum alloys (AlMg3 & AlSiMg). To produce butt joints with different laser power (4-5 kW), speed (67-100 mm/s), oscillation amplitude (0-3 mm), and frequency (0-300 Hz), a high-power single-mode laser was used. A hybrid volumetric heat source was used to develop a fully coupled 3D thermo-mechanical model in COMSOL Multiphysics software to analyze the temperature distribution, weld morphology, residual stresses, and post-solidification distortion. It was found that the sample with power 5 kW and speed 67 mm/s showed the highest tensile strength (249 MPa) but the overall optimum weld performance was achieved when the amplitude of the oscillation was 0.6 mm and the frequency was 200-300 Hz, which minimized residual stresses (from 185 to 172 MPa) and displacements (from 0.036 to 0.017 mm) compared to non-oscillating welds without compromising the tensile strength. Extreme oscillation levels (> 1.8 mm) resulted in poor mechanical behavior. The developed numerical model is an effective and cost-saving tool to minimize the extensive physical experiments to further optimize the weld parameters.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38866 - 38881"},"PeriodicalIF":2.6,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Research and Comparison of Hot Deformation Behavior and Microstructure Evolution of 316L Austenitic Stainless Steel in Two Organizational States","authors":"Xu Qiao, Fei Chen, Rongbin Li, Yongxing Jiao, Fei Li, Zhengang Du","doi":"10.1007/s11665-026-14621-4","DOIUrl":"10.1007/s11665-026-14621-4","url":null,"abstract":"<div><p>316L austenitic stainless steel is widely used in high-end fields such as petrochemical engineering and medical devices due to its excellent corrosion resistance and mechanical properties. Selective laser melting (SLM), as an additive manufacturing technology under vacuum conditions, provides a new approach for the efficient fabrication of complex-structured components. However, due to its unique microstructure and defects, the hot deformation behavior of SLM-fabricated materials differs from that of traditionally rolled ones. To investigate the hot deformation and microstructural evolution of SLM-fabricated 316L stainless steel, hot compression tests were conducted on a Gleeble-3800 machine at temperatures of 900-1200 °C and strain rates of 0.001-1 s<sup>-1</sup>. Microstructural characterizations were performed using optical microscopy (OM) and electron backscatter diffraction (EBSD) techniques, and hot processing maps were constructed to evaluate the hot working stability. The results demonstrate that the rolled-316L stainless steel exhibits higher flow stress and deformation resistance. In contrast, SLM-fabricated 316L, featured with high defect density and pronounced elemental segregation, presents work hardening behavior comparable to that of its rolled counterpart at the early deformation stage and is more susceptible to dynamic recrystallization (DRX). Processing maps reveal that the SLM-fabricated 316L has a smaller rheological instability region and superior hot working stability compared with the rolled-316L, with a stable processing window in the medium temperature/medium strain-rate range. Factors including temperature gradients, pore defects, interlayer microstructural inhomogeneity during SLM fabrication, and phase transformation during hot deformation lead to irregular fluctuations in the proportion of low-angle grain boundaries (LAGBs) under different processing conditions. This study provides theoretical insights and practical guidance for material selection and hot processing parameter optimization of 316L stainless steel in various industrial applications.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38609 - 38624"},"PeriodicalIF":2.6,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Anion-Specific Failure Mechanisms of Polydopamine Coatings on N80 Steel in HCl and H2SO4: A Comparative Study in Strongly Acidic Media","authors":"Shanjian Li, Jie Ren","doi":"10.1007/s11665-026-14562-y","DOIUrl":"10.1007/s11665-026-14562-y","url":null,"abstract":"<div><p>Polydopamine (PDA) coatings have great potential for corrosion protection in harsh acidic industrial environments. However, their performance and failure mechanisms in strongly acidic media at identical H⁺ concentrations but with different anions remain unclear. This work systematically compares the corrosion inhibition behavior of PDA coatings on N80 steel in hydrochloric acid and sulfuric acid media using static weight-loss measurements, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), UV-Vis spectrophotometry, and surface characterization. The results demonstrate significant anion-dependent behavior. At 25 °C, the corrosion inhibition efficiency reached 96.55% in 0.05 mol L<sup>−1</sup> H<sub>2</sub>SO<sub>4</sub> with a coating peeling rate of only 1.22%. In contrast, the efficiency was only 59.72% in 0.10 mol L⁻<sup>1</sup> HCl with a peeling rate of 3.38%. The charge-transfer resistance was higher and the coating structure was more stable in H<sub>2</sub>SO<sub>4</sub>. Increasing the acid concentration or temperature reduced the protective performance of the coating, with faster degradation observed in HCl. The Mechanistic analysis indicates that small, highly mobile Cl⁻ ions penetrate the coating and disrupt intermolecular interactions, whereas SO<sub>4</sub><sup>2</sup>⁻ interacts weakly with protonated PDA, thereby preserving coating integrity. These results provide a theoretical basis for designing PDA-based anticorrosion coatings for high-chloride acidic industrial environments.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38638 - 38648"},"PeriodicalIF":2.6,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gaohui Ji, Lanqin Yang, Wurong Wang, Yangyang Zhao, Xicheng Wei
{"title":"Comparative Study on High-Temperature Friction and Wear Behavior of Differently Surface-Treated H13 Steel Die and 7075 Aluminum Alloy Sheets","authors":"Gaohui Ji, Lanqin Yang, Wurong Wang, Yangyang Zhao, Xicheng Wei","doi":"10.1007/s11665-026-14567-7","DOIUrl":"10.1007/s11665-026-14567-7","url":null,"abstract":"<div><p>The sliding contact between aluminum alloy sheet and H13 steel in hot stamping often leads to severe wear and adhesive transfer, significantly degrading forming quality and tooling life. This study simulates the actual solution-forming-quenching process of hot stamping on a self-developed sheet-and-strip high-temperature friction tester. This study reveals the influence of different normal pressures on the thermal tribological behavior between three types of surface-modified H13 steel, quenched and tempered (Q&T) H13 steel:Q&T H13 steel combined with ion plasma nitriding (PN), and Q&T H13 steel combined with PVD-TiN coating (PVD-TiN) and high-temperature aluminum alloy. The experimental results show that with the increase of normal pressure, the coefficient of friction increases and adhesive wear is aggravated. The average coefficient of friction is 1.18 at 3.6 MPa and 1.34 at 5.4 MPa. Both PVD-TiN coating and nitriding coating exhibit excellent friction-reducing performance under different pressure conditions. Under the medium pressure condition of 4.5 MPa, the average coefficient of friction is 1.09 for PVD-TiN and 1.23 for PN, although the friction coefficient of the PVD-TiN surface-modified tool is lower than that of the surface nitrided tool, the adhesive wear is more severe than that of the surface nitrided tool because the thinner coating is prone to local spalling, exposing the fresh metal surface. However, the compounds such as Fe<sub>3</sub>N and Fe<sub>4</sub>N formed by nitriding treatment can effectively inhibit adhesion. Under the high-pressure condition of 5.4 MPa, the PVD-TiN surface-modified tool not only maintains a lower friction coefficient, the friction coefficient decreased from 1.34 in the untreated state to 1.14, but also the TiN particles formed on its surface can significantly reduce adhesive wear, showing better performance than the surface nitrided tool. The latter, however, deteriorates the contact condition of the friction pair due to the formation of Fe-Cr alloy aggregate particles caused by plastic deformation.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"39000 - 39015"},"PeriodicalIF":2.6,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Different Scanning Strategies on Microstructure and Mechanical Properties of Laser Powder Bed Fusion-Fabricated AlCoCrFeNi2.1","authors":"Chao Sun, Zeqin Cui, Liwei Lan, Xiaohu Hao, Weiguo Li, Wenxian Wang","doi":"10.1007/s11665-026-14540-4","DOIUrl":"10.1007/s11665-026-14540-4","url":null,"abstract":"<div><p>Optimization of scanning paths in laser additive manufacturing (LAM) is one of the key approaches to enhancing the quality and performance of metal components. In this study, the AlCoCrFeNi<sub>2.1</sub> high-entropy alloy was fabricated via laser powder bed fusion (LPBF) using six distinct scanning strategies. These include uniform rotation (0°, 67°, and 90°), strip mixed scanning (1 mm), and checkerboard mixed scanning (1 and 5 mm). The research reveals the evolution patterns of microstructure and mechanical properties induced by these different strategies. The results indicate that the 67° rotation scanning strategy achieved the lowest surface roughness (4.25 <i>μ</i>m). Compared to other scanning strategies, the 5-mm checkerboard mixed scanning strategy exhibits superior tensile properties, with a yield strength of 1112 ± 8.6 MPa, an ultimate tensile strength of 1351 ± 15.8 MPa, an elongation of 15.16 ± 1.3%, and higher impact toughness (31 J). Based on the mechanisms revealed in this study, the laser scanning path in LPBF can be optimized more rationally, thereby providing key guidance for the selection of process parameters in laser additive manufacturing (LAM) of high-entropy alloys.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38625 - 38637"},"PeriodicalIF":2.6,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interfacial Evolution and Fracture Mode Analysis of Dissimilar SS400 Steel/6061-t6 Aluminum Alloys via Friction Stir Spot Welding","authors":"Yuanbo Chu","doi":"10.1007/s11665-026-14284-1","DOIUrl":"10.1007/s11665-026-14284-1","url":null,"abstract":"<div><p>In this paper, friction stir spot welding (FSSW) is employed to join ultra-thin SS400 steel (0.8 mm thick) and 6061-t6 aluminum (Al) alloy (3 mm thick). The correlation between the evolution of intermetallic compounds (IMCs) and the tensile-shear performance of FSSW joints is systematically investigated by varying the tool rotational speeds. The FSSW joint cross section is divided into the pin influence zone (PIZ) and shoulder influence zone (SIZ). Microstructural characterizations reveal that phase-specific IMC layers form at the Al/steel interface in the PIZ and SIZ. The PIZ at 500 rpm is dominated by possible brittle Al-rich Fe₂Al₅, while possible Fe-rich phases (FeAl) become predominant at 700 and 900 rpm due to increased heat input. Tensile-shear tests show that the FSSW joint strength first increases and then decreases with tool rotational speed, reaching a maximum of 4986 ± 85 N at 700 rpm. Correspondingly, the failure mode transforms from interfacial failure (500 rpm) to button pullout failure (700 and 900 rpm). The optimal performance of the FSSW joint at 700 rpm is attributed to the synergistic effect of a robust Fe-rich IMC interface and moderate softening of the AA6061-t6 in the PIZ. This study clarifies the IMC evolution mechanism of ultra-thin steel-Al FSSW joints, providing a theoretical basis for parameter optimization in automotive lightweighting.</p></div>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"35 Focus—Space","pages":"38686 - 38696"},"PeriodicalIF":2.6,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}