Journal of Materials Research and Technology-Jmr&t最新文献

{"title":"Review on nature-inspired interfaces and mechanical interlocking techniques in additively manufactured adhesively bonded joints","authors":"P.H. Hari Krishna ,&nbsp;Thulasidhas DhilipKumar ,&nbsp;Karthik V. Shankar ,&nbsp;M.P. Hariprasad ,&nbsp;Arun Prasad Murali ,&nbsp;Ali El-Rayyes ,&nbsp;K.G. Prashanth","doi":"10.1016/j.jmrt.2025.09.150","DOIUrl":"10.1016/j.jmrt.2025.09.150","url":null,"abstract":"<div><div>This review assesses the impact of nature-inspired surface textures on adhesively bonded joints (ABJs) in additively manufactured (AM) structures, with a focus on recent advancements. As the use of AM increases for fabricating intricate geometries, the acceptance of adhesive joining has gained popularity, especially for overcoming size constraints in 3D printing large-scale components. The effectiveness of adhesively bonded AM structures depends on the joining strength, which in turn influences the overall performance of the structure. The current review discusses the influences of nature-inspired surface textures, such as fish scales (FS), lamellae, spider silk, cactus stems, and tree frog (TF) toe pads. Furthermore, mechanical interlocking designs, such as micro-patterned lap joints and tailored teeth, which can enhance shear strength by improving stress distribution and delaying fracture initiation, have also been briefly discussed. Moreover, the experimental and numerical studies examining the impacts of nature-based surface textures and mechanical interlocking designs on the shear behaviour of ABJs are briefly highlighted. This review aims to provide readers with a current understanding of recent developments in additively manufactured ABJs, offering valuable insights into the design and fabrication of advanced 3D-printed structures while outlining potential directions for future research in the field.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 998-1016"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120925","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":"Mesoscale numerical investigation of the multi-cracking behavior of Cr coatings on Zr alloys","authors":"Wenjie Zhang,&nbsp;Hailin Zhai,&nbsp;Mingjie Wu,&nbsp;Ziyi Li,&nbsp;Baiming Yao,&nbsp;Weidong Zhai,&nbsp;Jishen Jiang,&nbsp;Xianfeng Ma","doi":"10.1016/j.jmrt.2025.09.130","DOIUrl":"10.1016/j.jmrt.2025.09.130","url":null,"abstract":"<div><div>Chromium (Cr)-coated zirconium (Zr) alloys are considered candidate materials for accident-tolerant fuel (ATF) claddings in light-water reactors. However, the multi-cracking behavior of the Cr coating under external loading might be a potential threat to the integrity of the coated claddings during operation. Comprehensive mechanistic research on this temperature- and microstructure-dependent microcracking behavior is lacking. In this study, a mesoscale numerical model was built to study the cracking behavior of the Cr coating on Cr-coated Zr alloys based on a crystal plasticity finite element model (CPFEM) combined with the extended finite element method (XFEM). The results indicated that the nucleation site of the initial coating crack is governed by the grain orientation distribution, and the magnitude of the local misorientation influences the initiation rate. The evolution and saturation of the coating cracks are determined by the grain characteristics and island length. Grain orientation dictates crack positioning, whereas island length determines whether cracks can propagate through the coating thickness. A method for estimating the saturated crack density in coatings based on the stress field distribution is proposed, and the saturation crack predictions are consistent with direct crack simulation results. The observed reduction in coating saturation crack density at 400 °C is directly attributed to enhanced substrate plasticity, which results in strain localization and significant crack tip blunting.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 904-919"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120918","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":"Printability and grain refinement in stainless steel processed by non-contact ultrasound-assisted additive manufacturing","authors":"Jiasen Han ,&nbsp;Hui Chen ,&nbsp;Yuanxi Huang ,&nbsp;Lin Xiang ,&nbsp;Jianquan Tao ,&nbsp;Xin Lin","doi":"10.1016/j.jmrt.2025.09.142","DOIUrl":"10.1016/j.jmrt.2025.09.142","url":null,"abstract":"<div><div>Additive manufacturing of laser directed energy deposition (L-DED) is flexible in fabricating and repairing metal parts. However, the mechanical property of the fabricated part is compromised by the coarse and epitaxial grains. Although L-DED assisted by ultrasound in contact-transmission mode can promote grain refinement, it simultaneously brings side effects such as poor printability and unstable ultrasonic energy in melt pool. This work proposes an ultrasound-assisted L-DED in non-contact mode, using 316L stainless steel as the mode material. Due to the dissipated and moderate energy of non-contact ultrasound in the melt pool, smooth and regular melted tracks can be obtained without fusion defects, showing excellent printability to the sample. Meanwhile, the non-contact ultrasound can effectively refine the grain structure and reduce the texture intensity of the 316L stainless steel, leading to notable improvements in both the magnitude and uniformity of hardness of the fabricated sample. The effects of ultrasonic parameters, such as the incidence angle and energy intensity on the morphology of single tracks, microstructure, and hardness of the alloy were investigated systematically. The L-DED assisted by non-contact ultrasound simultaneously achieved excellent printability and refined microstructure, resolving the trade-off between printability and grain refinement in conventional contact-ultrasound-assisted additive manufacturing.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 548-557"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108966","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":"Temperature-dependent mechanical properties governed by austenite stability in co-precipitation strengthened medium Mn steel with heterogeneous microstructure","authors":"Sang-Myeong Jeon ,&nbsp;Yong-Su Lim ,&nbsp;Jin-Seob Kim,&nbsp;Jin-Kyung Kim","doi":"10.1016/j.jmrt.2025.09.104","DOIUrl":"10.1016/j.jmrt.2025.09.104","url":null,"abstract":"<div><div>Using the partially recrystallized medium Mn steel containing B2 and MC carbide as a model system, this study reported its tensile properties at temperatures ranging from −150 to 150 °C. The heterogenous and partially recrystallized microstructure after intercritical annealing at 620 °C consisted of α, γ, and tempered α′ in the equiaxed zone and γ and tempered α′ in the lath zone. Furthermore, tempered α′/α and γ grains contained mainly MC carbide and B2 precipitates, respectively. The temperature-dependent tensile properties were investigated for the material annealed at 620 °C for 16 h. The ultimate tensile strength and strain hardening rate increased continuously with decreasing deformation temperatures. The total elongation was at maximum at 25 °C and decreased with increasing or decreasing deformation temperatures from 25 °C. The high strain hardening of the material deformed at −150 °C originated from its high dislocation density, a large amount of deformation-induced α′ contributing to HDI strengthening, and strain hardening by the TRIP effect. Therefore, the temperature-dependent mechanical properties of the investigated material are mainly governed by the mechanical stability of γ, affecting DIMT behavior and HDI strengthening. The fractography analysis showed an increase in the degree of brittle fracture with decreasing deformation temperatures. Faster DIMT kinetics with decreasing deformation temperatures can lead to higher strain localization and a predominantly brittle fracture surface. This study provides insights into the temperature-dependent phase-specific deformation mechanisms, DIMT behavior, HDI strengthening, and damage behavior of medium Mn steel.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 960-972"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120945","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":"Microstructure evolution and corrosion behavior of Ti-6Al-4V alloy induced by laser shock peening without coating","authors":"Longlong Zhou ,&nbsp;Weiling Guo ,&nbsp;Gengchao He ,&nbsp;Haidou Wang ,&nbsp;Jun Zhou ,&nbsp;Zhenbing Cai ,&nbsp;Zhiguo Xing","doi":"10.1016/j.jmrt.2025.09.147","DOIUrl":"10.1016/j.jmrt.2025.09.147","url":null,"abstract":"<div><div>Ti-6Al-4V alloy has been widely used in various engineering fields due to its excellent mechanical properties. However, when applied in marine environments, its surface is susceptible to electrochemical corrosion caused by chloride ion erosion, which significantly restricts the long-term service performance and reliability of the alloy under harsh marine conditions. Therefore, it is imperative to enhance its corrosion resistance through surface modification techniques. To address this issue, the laser shock peening without coating (LSPwC) technique was applied to enhance the alloy surface properties. A hydrophobic structure and an oxide layer were fabricated on the Ti-6Al-4V surface through controlled gradient laser energy and multiple impact passes. The corrosion resistance mechanism induced by LSPwC was systematically investigated. Results indicated that LSPwC treatment increased the alloy's surface roughness while generating a dense oxide layer. The microhardness of the treated alloy increased by 30 %, and the residual compressive stress increased from −120 MPa in the base state to −615 MPa. Through contact angle testing, it was found that the contact angle of the alloy surface after LSPwC treatment increased to over 100°. After LSPwC treatment, the average grain size of the alloy decreased from 1.38 μm to 1.10 μm, while the average KAM value increased from 0.63° to 0.72°. Simultaneously, the alloy subjected to LSPwC generated a significant number of dislocation structures. Electrochemical analyses further demonstrated that the treated alloy exhibited a larger impedance arc radius, elevated charge transfer resistance, a positive shift in corrosion potential, and a substantial reduction in corrosion current density. These findings provide critical theoretical support for applying LSPwC-treated Ti-6Al-4V alloys in marine corrosion-resistant applications.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 647-659"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108903","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 Al/Co ratio on phase stability and mechanical behavior of mechanically alloyed AlxCoyCrFeNi HEAs","authors":"Chun-Liang Chen ,&nbsp;Fang-Yu Huang ,&nbsp;Geoff West","doi":"10.1016/j.jmrt.2025.09.127","DOIUrl":"10.1016/j.jmrt.2025.09.127","url":null,"abstract":"<div><div>This study investigates the effect of the Al/Co ratio on phase evolution and mechanical behavior in Al_xCo_yCrFeNi high-entropy alloys synthesized via mechanical alloying followed by high-temperature sintering. The variation in Al/Co ratio (0.14–1.00) was employed to tailor phase formation and optimize mechanical performance. XRD, EBSD/EDS, and TEM analyses revealed a compositional-dependent transition from a predominantly FCC matrix to the formation of BCC (AlNi-rich B2 and Cr-rich A2) phases and eventually to a brittle (Cr,Fe)-rich sigma phase at high Al/Co ratios. Mechanical testing demonstrated that the low-Al/Co alloy exhibited exceptional compressive strength and ductility due to its refined FCC grains and deformation twins. In contrast, alloys with high Al/Co ratios showed increased hardness but reduced toughness, attributed to sigma phase formation and oxide dispersion. The results highlight the critical role of Al/Co ratio in controlling solid-solution strengthening, lattice distortion, and phase stability. This work provides design insights for optimizing microstructure and performance in HEAs via Al/Co tuning and non-equilibrium processing, contributing to the rational development of next-generation structural materials.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 1222-1231"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159784","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":"Mechanistic understanding of Zn-based coating on high-strength pearlitic steel wire for bridge cable","authors":"Pan Cai ,&nbsp;Chengyang Hu ,&nbsp;Xiaoxiong Zhu ,&nbsp;Zemin Xu ,&nbsp;Jie Zhou ,&nbsp;Lin Cheng ,&nbsp;Huajuan Xue ,&nbsp;Jun Zhao ,&nbsp;R.D.K. Misra ,&nbsp;Kaiming Wu","doi":"10.1016/j.jmrt.2025.09.146","DOIUrl":"10.1016/j.jmrt.2025.09.146","url":null,"abstract":"<div><div>Corrosion usually leads to premature failure of bridge cable steel wire. In order to further improve the corrosion resistance of hot-dipped galvanized steel wire for bridge cables, a new type of Zn-10Al-RE alloy coating was designed. The Al content of the traditional coating was increased, and RE was added to improve the coating performance. Combined with electrochemical experiments and first-principles calculations, the enhancement effect of RE element on the performance of the coating was clarified. The Zn-10Al-0.1RE coating exhibited the most uniform microstructure, characterized by a refined eutectic phase structure, which facilitated the formation of dense and protective corrosion products. Electrochemical tests and neutral salt spray experiments demonstrated superior corrosion resistance, with the 0.1 % RE-doped coating showing the lowest corrosion rate (16 mg m⁻² h⁻¹ after 1200 h). First-principles calculations revealed that RE doping increases surface stability by reducing surface energy and enhancing ion adsorption, thereby promoting the formation of protective Zn₅(OH)₈Cl₂ and ZnAl-LDHs−CO₃ layers. The findings highlight the synergistic effects of Al and RE in improving corrosion resistance, providing insights for designing high-performance Zn-based coatings for bridge cable.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 558-575"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108967","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 the solidification rate on the microstructure and mechanical properties of rapidly solidified Al-Mg-Si alloy","authors":"Qi Liu ,&nbsp;Yibo Jin ,&nbsp;Qian Bian ,&nbsp;Haoxue Yang ,&nbsp;Tong Zhang ,&nbsp;Jinshan Li ,&nbsp;Jun Wang","doi":"10.1016/j.jmrt.2025.09.151","DOIUrl":"10.1016/j.jmrt.2025.09.151","url":null,"abstract":"<div><div>Al-Mg-Si aluminum alloys have excellent strength, toughness and corrosion resistance properties and are widely used in automobile, aerospace and various fields. In this work, the influence of the solidification cooling rate on the microstructure, second phase precipitation, microscopic segregation and mechanical properties of an Al-0.8Mg-0.7Si aluminum alloy was studied in detail. With increasing cooling rate, the secondary dendrite arm spacing gradually decreased from 38.9 μm (105 °C/s) to 9.3 μm (1516 °C/s), and interdendrite segregation gradually weakened. A higher cooling rate refines the α-Al matrix and increases the solid solubility. The hardness of the aluminum alloy increases with increasing cooling rate through solution strengthening and grain refinement strengthening. After deformation heat treatment, the aluminum alloy underwent complete recrystallization, forming uniform equiaxed grains. With increasing cooling rate, the average grain size decreased from 18.6 μm (105 °C/s) to 8.6 μm (1516 °C/s). However, the solution strengthening effect of samples with higher cooling rates decreased significantly because of more pronounced exsolution. With increasing cooling rate, the mechanical properties of the heat-treated aluminum alloy first tended to increase but then decreased, and the samples cooled at 489 °C/s achieved the best strength-ductility match (tensile strength of 230.3 MPa and elongation of 32.7 %) among all the heat-treated samples.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108912","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":"Mechanical response and deformation mechanism of TA1 pure titanium during electrically assisted tension","authors":"Hushan Li ,&nbsp;Chaogang Ding ,&nbsp;Zhenhai Xu ,&nbsp;He Tao ,&nbsp;Chengxi Zhu ,&nbsp;Jie Xu ,&nbsp;Bin Guo ,&nbsp;Debin Shan","doi":"10.1016/j.jmrt.2025.09.077","DOIUrl":"10.1016/j.jmrt.2025.09.077","url":null,"abstract":"<div><div>Electrically assisted forming (EAF) is an advanced thermomechanical processing technology that has garnered increasing attention in recent years due to its ability to significantly reduce flow stress and enhance the formability of metals. In this study, electrically assisted tension (EAT) were performed on pure titanium at various current densities. The electro-thermal-mechanical response, along with the evolution of texture, grain orientation, deformation twinning, and dislocation morphology, was systematically characterized using infrared thermal imaging, digital image correlation (DIC), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). These analyses provided deeper insights into the deformation mechanisms of pure titanium under electric current. The results indicate that both flow stress and strain hardening capacity decrease with increasing current density during EAT. Although the total elongation was reduced due to the non-uniform distribution of temperature induced by Joule heating, the local strain remained nearly unchanged. At low current densities, pronounced deformation twins formed within the grains, and twin-twin interactions led to the formation of characteristic high-angle grain boundaries. However, as the current density increased, twinning activity was progressively suppressed. Moreover, the enhancement of the Joule heating effect promotes dislocations annihilation and slip, and the tendency of dynamic recrystallization is obvious, which slows down the accumulation of dislocations and leads to a significant reduction in flow stress. Consequently, dislocation slip became the dominant deformation mechanism with the increasing current density during EAT. This study provides both experimental evidence and theoretical support for the <span>EAF</span> of pure titanium.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 945-959"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120957","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 variations in peak and background currents during pulsed current gas tungsten arc welding on the dissimilar welded joint of ASTM A105-AISI 316L: Microstructural changes, mechanical properties and fracture mechanism","authors":"M. Sabzi,&nbsp;H.R. Jafarian,&nbsp;A. Abdollahzadeh,&nbsp;S.H. Mousavi Anijdan,&nbsp;A.R. Eivani","doi":"10.1016/j.jmrt.2025.09.162","DOIUrl":"10.1016/j.jmrt.2025.09.162","url":null,"abstract":"<div><div>The aim of this study was to investigate the effect of variations in peak (I_p) and background (I_b) currents during Pulsed Current Gas Tungsten Arc Welding (PCGTAW) on microstructural changes, significant improvement of mechanical properties and fracture mechanism of dissimilar welded joints of ASTM A105-AISI 316L. For this purpose, 12 mm thick AISI 316L stainless steel sheets and ASTM A105 steel sheets were welded together by PCGTAW process with I_p values of 180, 220 and 260A, and I_b values of 70, 110 and 150A. Optical microscopy, Field Emission Scanning Electron Microscopy (FE-SEM), Energy-Dispersive X-Ray Spectroscopy (EDS), and X-Ray Diffraction (XRD) were used to analysisthe microstructural and phase changes. Similarly, tensile, Vickers microhardness and Charpy impact tests were utilizedto evaluate the effect of changes in I_b and I_p currents on mechanical properties. The fracture mechanism after tensile and Charpy impact tests was investigated by FE-SEM. Microscopic studies indicated that the microstructure of the weld metal (WM) contained austenite dendrites with a small amount of grain boundary delta ferrite, to the extent that with increasing I_b and decreasing I_p, the microstructure of the WM was changed from columnar dendrites to extremely small and coaxial dendrites. Likewise, the increased I_b and decreased I_p reduced the size of dendrites as well as the amount of grain boundary delta ferrite in WM and sodidthe width of the heat-affected zone (HAZ) and partial melted zone (PMZ). The results of XRD analysis indicate the predominance of the austenite phasein WM. In the tensile test, all welded joints were fractured from the ASTM A105 steel side. The welded joints built up yield strength of approximately 250 ± 8 MPa, a tensile strength of around 484 ± 9 MPa, and a fracture strain close to 30 ± 2 %.The results of Charpy impact and microhardness tests showed that with increasing I_b and decreasing I_p, the hardness (from 250 ± 5 HV to 289 ± 4 HV) and fracture energy (from 140 ± 3 J to 173 ± 3 J) of WM are increased. Fractography of the fracture surfaces indicates the occurrence of fully ductile fracture in both tensile and Charpy impact tests.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"39 ","pages":"Pages 891-903"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121292","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}