International Journal of Refractory Metals & Hard Materials最新文献_第7页

Influence of freezing temperature on microstructure and properties of lamellar MoCu composites fabricated by ice-templating method 冻结温度对冰模板法制备MoCu片层复合材料微观结构和性能的影响

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-24 DOI: 10.1016/j.ijrmhm.2025.107402

Qiao Zhang , Shixiong Kou , Zheng Chen , Jiayu Yang , Nan Deng , Shuhua Liang

{"title":"Influence of freezing temperature on microstructure and properties of lamellar MoCu composites fabricated by ice-templating method","authors":"Qiao Zhang , Shixiong Kou , Zheng Chen , Jiayu Yang , Nan Deng , Shuhua Liang","doi":"10.1016/j.ijrmhm.2025.107402","DOIUrl":"10.1016/j.ijrmhm.2025.107402","url":null,"abstract":"<div><div>In this paper, lamellar Mo<img>Cu composites with alternating distribution of Mo phase and Cu phase were prepared by ice-templating and infiltration methods. Briefly, a homogeneous slurry containing Mo powder (2–3 μm), polyvinyl alcohol (PVA), and deionized water was ball-milled, directionally frozen at controlled temperatures (−10 °C to −70 °C), freeze-dried, and then thermally decomposed to form a porous Mo skeleton. Finally, the skeleton was infiltrated with molten Cu at 1350 °C to obtain the dense composite. With the decrease of the freeze temperature, the thickness of the lamellar Mo<img>Cu composite gradually decreases from 34 μm (−10 °C) to 5 μm (−70 °C), the number of interfaces gradually increases, and the hardness of the lamellar Mo<img>Cu composite surface perpendicular to the lamellar direction becomes higher and higher (the maximum hardness value can reach 160.4 HV<sub>0.3,</sub> a 33.3 % enhancement compared to conventional homogeneous Mo<img>Cu composites). The thermal conductivity parallel to lamellae decreases from 260.7 W/m·K (−10 °C) to 249.3 W/m·K (−70 °C), while the thermal expansion coefficient parallel to lamellae reduces from 1.12 × 10<sup>−5</sup>/K (−10 °C) to 9.36 × 10<sup>−6</sup>/K (−70 °C). The thermal conductivity parallel to the lamellar direction is higher than that perpendicular to the lamellar direction, and the average thermal expansion coefficient is lower than that perpendicular to the lamellar direction. The thermal conductivity and thermal expansion coefficient of the lamellar Mo<img>Cu composite parallel to the lamellar direction achieve a good match, demonstrating its potential for advanced thermal management applications.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107402"},"PeriodicalIF":4.6,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902302","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

Enhanced mechanical properties of WC-15NiTi alloy via NiTi solid solution binder: A breakthrough in cemented carbides 利用NiTi固溶体粘结剂增强WC-15NiTi合金力学性能：硬质合金领域的突破

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-22 DOI: 10.1016/j.ijrmhm.2025.107396

Wu Jiang , Shun Chen , Fan Zhang , Yongzhong Jin , Ruipeng Mao , Wei Su , Junhao Wang

{"title":"Enhanced mechanical properties of WC-15NiTi alloy via NiTi solid solution binder: A breakthrough in cemented carbides","authors":"Wu Jiang , Shun Chen , Fan Zhang , Yongzhong Jin , Ruipeng Mao , Wei Su , Junhao Wang","doi":"10.1016/j.ijrmhm.2025.107396","DOIUrl":"10.1016/j.ijrmhm.2025.107396","url":null,"abstract":"<div><div>To overcome the technical limitation of inferior mechanical performance in conventional WC-Ni alloys, a WC-15NiTi alloy exhibiting superior mechanical characteristics was fabricated by employing NiTi solid solution powders as the binder-phase precursor. This research aims to explore how different approaches of introducing Ti affect the microstructural evolution and mechanical behavior of the resulting alloy. Experimental findings indicate that incorporating NiTi solid solution powders can efficiently suppress the abnormal growth of WC grains, markedly reduce the average grain size, and promote a homogeneous dispersion of the bonding phase while avoiding the formation of Ni pool defects. These improvements yield a bending strength of 2804 MPa, a Vickers hardness of 1427 HV<sub>30</sub>, and a fracture toughness of 14.65 MPa·m<sup>1</sup>/<sup>2</sup>, representing increases of 43.5 %, 72.7 % and 12 %, respectively, relative to the Ti-free alloy. Furthermore, the NiTi solid solution phase is predominantly retained within the alloy's microstructure following the sintering process. This contributes to the enhancement of both the structural characteristics and mechanical performance of the material through mechanisms such as solid solution hardening and improved interfacial adhesion with WC particles. The study presents a valuable investigation into the reinforcement and fracture resistance imparted by the solid solution binder phase in WC-Ni composites, shedding light on potential strategies for advancing the design and fabrication of other high-strength metallic ceramics.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107396"},"PeriodicalIF":4.6,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902303","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 residual cobalt on cutting edge wear behavior in Polycrystalline Diamond Compact (PDC) 残余钴对聚晶金刚石压片（PDC）刃口磨损行为的影响

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-22 DOI: 10.1016/j.ijrmhm.2025.107390

Li Zhou , Duanwei He , Yinxing Su , Xiong Xiao , Yewu Sun , Khalid Nabulsi , Xiuyan Wei , Zuguang Hu , Jianyun Yang , Guodong David Zhan

{"title":"Effect of residual cobalt on cutting edge wear behavior in Polycrystalline Diamond Compact (PDC)","authors":"Li Zhou , Duanwei He , Yinxing Su , Xiong Xiao , Yewu Sun , Khalid Nabulsi , Xiuyan Wei , Zuguang Hu , Jianyun Yang , Guodong David Zhan","doi":"10.1016/j.ijrmhm.2025.107390","DOIUrl":"10.1016/j.ijrmhm.2025.107390","url":null,"abstract":"<div><div>Cobalt, as a metallic binder, plays a critical role in the sintering process of Polycrystalline Diamond Compacts (PDC) and directly influences their final performance, particularly in terms of wear resistance. Consequently, investigating the impact of residual cobalt on the wear resistance of PDC is of significant practical importance. In this study, PDC samples containing 9 % cobalt were prepared via High-Temperature High-Pressure (HTHP) sintering, followed by a decobaltization process that reduced the cobalt content to 1 %. The wear resistance of both non-decobaltized and decobaltized PDC cutters was subsequently tested. The experimental results indicate that residual cobalt does not significantly influence purely mechanical wear. However, as edge wear intensifies and cutting heat accumulates during turning operations, the thermal expansion mismatch between residual cobalt and diamond results in chipping at the edge near the rake face, ultimately leading to a decrease in wear resistance. The decobaltization treatment effectively reduces the residual cobalt content and significantly inhibits the initiation and propagation of micro-cracks along the cutting edge, thereby enhancing the wear resistance of PDC.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107390"},"PeriodicalIF":4.6,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892292","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

Machine learning assisted design of CrTaTiV-based refractory high entropy alloys with enhanced hardness 机器学习辅助设计具有增强硬度的crtativ基耐火高熵合金

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-22 DOI: 10.1016/j.ijrmhm.2025.107400

Liang Li, Shu Wang, Chen Su, Shengfeng Guo

引用次数: 0

Regulating thermomechanical behavior of W and γ phases in tungsten heavy alloys via Mn-induced strengthening 通过mn诱导强化调节重钨合金中W和γ相的热力学行为

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-22 DOI: 10.1016/j.ijrmhm.2025.107395

Yanzhang Dai , Kun Li , Xu Luo , Guangwei Zhang , Wanghu Pan , Guopeng Wang , Huichao Cheng , Jianpeng Zou , Yong Liu

{"title":"Regulating thermomechanical behavior of W and γ phases in tungsten heavy alloys via Mn-induced strengthening","authors":"Yanzhang Dai , Kun Li , Xu Luo , Guangwei Zhang , Wanghu Pan , Guopeng Wang , Huichao Cheng , Jianpeng Zou , Yong Liu","doi":"10.1016/j.ijrmhm.2025.107395","DOIUrl":"10.1016/j.ijrmhm.2025.107395","url":null,"abstract":"<div><div>The synergistic deformation behavior between the W and γ phases plays a critical role in governing the microstructural evolution and strengthening mechanisms of tungsten heavy alloys (WHAs). Here, we systematically investigate the thermomechanical behavior and constitutive models of W-NiFeCo and W-NiFeCoMn alloys, with emphasis on the distinct deformation roles of each phase and the strengthening effect of Mn element. Four constitutive models were established, among which the modified Johnson-Cook equation exhibited the highest predictive accuracy over a wide deformation range (600–1200 °C, 10<sup>−3</sup>–1 s<sup>−1</sup>). Deformation temperature plays a dominant role in determining hot workability. Below the recrystallization temperature of the γ phase, stress-induced specific orientation relationships between W and γ phases promote coordinated deformation and efficient strain hardening. However, excessive deformation temperatures promote γ phase recrystallization and W grain coarsening lead to the mixed grain in WHAs, degrading interphase compatibility and increasing instability risk. Mn addition significantly raises the γ phase recrystallization temperature, suppresses mixed grain formation, and enables stable softening of W particles under high temperatures. Additionally, solid-solution strengthening by Mn enhances γ phase strength and reduces the mechanical mismatch between phases, thereby improving co-deformation and work-hardening. Processing maps indicate that, for the W-NiFeCoMn alloy, deformation at 800 °C and a strain rate of 0.005 s<sup>−1</sup> corresponds to a high-power dissipation efficiency and stable flow behavior, whereas the W-NiFeCo alloy exhibits a greater tendency toward early γ phase recrystallization and local flow instability under comparable conditions.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107395"},"PeriodicalIF":4.6,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917072","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

Functionally graded molybdenum cladding on 316L stainless steel via laser-powder directed energy deposition 激光粉末定向能沉积在316L不锈钢上的功能梯度钼包层

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-21 DOI: 10.1016/j.ijrmhm.2025.107393

Qianwen Zhang, Xiaoyuan Lou

{"title":"Functionally graded molybdenum cladding on 316L stainless steel via laser-powder directed energy deposition","authors":"Qianwen Zhang, Xiaoyuan Lou","doi":"10.1016/j.ijrmhm.2025.107393","DOIUrl":"10.1016/j.ijrmhm.2025.107393","url":null,"abstract":"<div><div>The study investigated the employment of laser-powder directed energy deposition (LP-DED) additive manufacturing (AM) to produce Mo cladding on 316L stainless steel (SS). The formation of brittle intermetallic compounds (IMCs) at the Mo-SS interface leads to mechanical degradation and cracking during laser solidification. This study investigates strategies to minimize IMCs formation by optimizing deposition parameters, implementing compositionally graded transitions, and refining process control. Three deposition strategies were examined: direct Mo deposition, continuously graded transition, and discontinuously graded transition. The study demonstrated the dense pure Mo can be achieved by optimizing deposition parameters. Continuously graded deposition resulted in delamination at 40–50 wt% Mo due to peak Laves phase formation, whereas the discontinuously graded approach effectively bypassed critical IMC-forming regions, reducing crack width and depth. Despite the improvements, residual cracking persisted due to thermal accumulation effects, necessitating further process refinements.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107393"},"PeriodicalIF":4.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888913","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

Research on tool wear and surface integrity during micro-drilling nickel-based superalloy K4169 with PCBN double-point-angle micro-drill PCBN双点角微钻头微钻镍基高温合金K4169的刀具磨损和表面完整性研究

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-21 DOI: 10.1016/j.ijrmhm.2025.107394

Yue Ma , Zhiqiang Liang , Yuchao Du , Lingda Xiong , Zhipeng Su , Haofei Guo , Shuying Zhang , Pengwan Chen

{"title":"Research on tool wear and surface integrity during micro-drilling nickel-based superalloy K4169 with PCBN double-point-angle micro-drill","authors":"Yue Ma , Zhiqiang Liang , Yuchao Du , Lingda Xiong , Zhipeng Su , Haofei Guo , Shuying Zhang , Pengwan Chen","doi":"10.1016/j.ijrmhm.2025.107394","DOIUrl":"10.1016/j.ijrmhm.2025.107394","url":null,"abstract":"<div><div>Nickel-based superalloys are widely used in key micro-hole components of aero-engines due to their excellent high-temperature chemical and mechanical properties. This work focused on tool wear and surface integrity during micro-drilling K4169 nickel-based superalloy utilizing developed new PCBN double-point-angle micro-drill (PDPA-MD) with a diameter of 0.4 mm. The evolution of tool wear characteristics and wear mechanism of PCBN micro-drill are analyzed, and the micro-hole surface integrity is systematically evaluated from the aspects of hole entrance morphology, hole-wall roundness, microhardness and microstructure of subsurface deformation layer. The results show that, the tool wear zone of PCBN micro-drill is concentrated in the chisel edge and the flank area close to the main cutting edge, and the tool wear mechanisms mainly include adhesive wear, abrasive wear, and micro chipping. Distorted grains with plastic slip bands are observed in the plastic deformation layer around the hole entrance of the processed superalloy micro-holes. The closer the grains are to the hole-wall, the denser the distribution of slip lines inside the grains, and the higher the microhardness value of the subsurface layer material. Compared with ordinary PCBN micro-drill, PDPA-MD has better wear resistance, the micro-holes processed by PDPA-MD have smaller roundness error and hole-wall roughness, lower microhardness of the subsurface plastic deformation layer, which significantly improves the surface integrity of the superalloy micro-hole.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107394"},"PeriodicalIF":4.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892256","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 Ti on the microstructure and mechanical properties of equiatomic NbTaTi medium-entropy alloy Ti对等原子NbTaTi中熵合金显微组织和力学性能的影响

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-21 DOI: 10.1016/j.ijrmhm.2025.107391

Deekshith G. Kalali , K. Sanath Kumar , S. Anilkumar , K. Guruvidyathri , K. Nanda Kishore , Joydip Joardar , Koteswararao V. Rajulapati

{"title":"Effect of Ti on the microstructure and mechanical properties of equiatomic NbTaTi medium-entropy alloy","authors":"Deekshith G. Kalali , K. Sanath Kumar , S. Anilkumar , K. Guruvidyathri , K. Nanda Kishore , Joydip Joardar , Koteswararao V. Rajulapati","doi":"10.1016/j.ijrmhm.2025.107391","DOIUrl":"10.1016/j.ijrmhm.2025.107391","url":null,"abstract":"<div><div>NbTa and NbTaTi alloys were processed using vacuum arc melting and both the alloys have resulted in single phase BCC structures. Heat treatment at 1473 K for 24 h did not alter the phase structure in the NbTa alloy and single phase BCC was retained. However, under similar heat treatment conditions, a phase transformation was observed in NbTaTi alloy, forming a minor HCP phase along with a major BCC phase. These experimental findings are also in good agreement with CALPHAD (Calculation of Phase Diagrams) studies. The addition of Ti reduced the overall density and grain size from ≈190 μm to ≈55 μm in the heat-treated condition. Ti addition also improved the hardness of the NbTa alloy (i.e., NbTa as-cast: 3.07 ± 0.02 GPa and NbTaTi as-cast: 4.3 ± 0.05 GPa). After heat treatment, the hardness of the NbTa alloy did not change significantly, however, the hardness of the NbTaTi alloy decreased from 4.3 ± 0.05 GPa to 2.56 ± 0.13 GPa. This reduction in hardness is attributed to decreased solid solution strengthening due to the reduction in Ti at. % within the major BCC phase after heat treatment. Another striking feature of this investigation is these novel medium-entropy alloys (MEAs) with less number of alloying elements in them exhibit excellent density-normalized hardness (=hardness/density), demonstrating their potential as high-performance refractory MEAs for advanced applications.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107391"},"PeriodicalIF":4.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902305","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

Study on the high intensity tungsten alloys with the addition of rhenium metal prepared by microwave sintering 微波烧结添加金属铼制备高强度钨合金的研究

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-21 DOI: 10.1016/j.ijrmhm.2025.107378

Chenlong Wei , Xuexiang Wang , Jiayu Fang , Huihui Qiao , Jun Wen , Peng Tong

{"title":"Study on the high intensity tungsten alloys with the addition of rhenium metal prepared by microwave sintering","authors":"Chenlong Wei , Xuexiang Wang , Jiayu Fang , Huihui Qiao , Jun Wen , Peng Tong","doi":"10.1016/j.ijrmhm.2025.107378","DOIUrl":"10.1016/j.ijrmhm.2025.107378","url":null,"abstract":"<div><div>Tungsten alloys are widely used in military, industrial and medical fields due to their excellent mechanical properties. However, they also face the problem of insufficient strength in extreme environments at the same time. In this study, green embryos were prepared by powder metallurgy and sintered in a microwave tube furnace at different temperatures. Tungsten alloy samples of 90 W-7Ni-3Fe (90 W) and 90 W-7Ni-3Fe with an additional 1 wt% Re(90 W-Re) were successfully prepared. The surface and cross-sectional morphologies of both were analyzed, and the influence of adding rhenium on the grain size and mechanical properties of tungsten alloys was studied. In this experiment, 90 W-Re achieved a density of 98.93 % at 1475 °C and a maximum bending strength of 2024.1 MPa at 1500 °C, which was 229.1 MPa higher than that of 90 W under the same conditions. It was explored that with the increase of temperature, the fracture mode changed from being dominated by intergranular fracture to transgranular fracture and the dissociation of tungsten from the binder phase γ(Ni, Fe) was dominated. Comprehensively considered, 90 W and 90 W-Re were held at 1475 °C for 10 min to obtain the optimal sintering points of this experiment. The preparation of 90 W-Re through microwave sintering provides a new way to improve the bending strength of tungsten alloys.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107378"},"PeriodicalIF":4.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903964","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 Mo/Cr single-doping and MoCr co-doping on the TiC/steel Interface in metal matrix composites Mo/Cr单掺杂和MoCr共掺杂对金属基复合材料TiC/steel界面的影响

IF 4.6 2区材料科学

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-20 DOI: 10.1016/j.ijrmhm.2025.107377

Jiaxin Li , Xiang Wang , Qingnan Han , Minghui Cheng , Ruiheng Li , Zhaoyang Liang , Hui Li , Jiaxiang Zhao , Xuliang Ma

{"title":"Effects of Mo/Cr single-doping and MoCr co-doping on the TiC/steel Interface in metal matrix composites","authors":"Jiaxin Li , Xiang Wang , Qingnan Han , Minghui Cheng , Ruiheng Li , Zhaoyang Liang , Hui Li , Jiaxiang Zhao , Xuliang Ma","doi":"10.1016/j.ijrmhm.2025.107377","DOIUrl":"10.1016/j.ijrmhm.2025.107377","url":null,"abstract":"<div><div>The inadequate interface bonding strength between reinforced particles and the metal matrix in particle-reinforced steel matrix composites (PR-SMCs) is a primary factor contributing to mechanical property degradation. In this study, alloying was used to improve the interface bonding strength between TiC and matrix. First-principle calculations and experimental characterization were employed to analyze the influence of Mo/Cr single-doping and Mo<img>Cr co-doping on the TiC/Fe interface bonding behavior. The results demonstrated that Mo single-doping significantly promoted interface segregation and enhanced interface bonding strength. However, excessive Mo resulted in precipitation at grain boundaries and a reduction in plasticity. Cr single-doping enhanced the mechanical properties of SMCs by increasing cementite hardness and interface stability but could not effectively reduce the interface mismatch. The synergistic effect of Mo<img>Cr co-doping optimized interface bonding by suppressing excessive Mo segregation and reducing the thickness of the interface layer. The Mo1.6Cr0.4 composites exhibited the best overall mechanical properties, with a tensile strength of 1435 ± 15 MPa and an elongation of 7.3 ± 0.3 %. In contrast, excess Cr (>1.2 wt%) in Mo<img>Cr co-doping SMCs promoted the formation of intermetallic compounds and acicular ferrite, which led to a reduction in mechanical properties. This study provides both a theoretical basis and novel insights into the alloying design of TiC-SMCs.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107377"},"PeriodicalIF":4.6,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892293","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