International Journal of Refractory Metals & Hard Materials最新文献

{"title":"The corrosion performance for ultrafine WC-12Co processed by heat treatments in different pH solutions","authors":"Yiqi Zhou ,&nbsp;Yikun Liu ,&nbsp;Shuoyang Wang ,&nbsp;Zhansu Yue ,&nbsp;Yucheng Ji ,&nbsp;Wentao Qin ,&nbsp;Decheng Kong ,&nbsp;Xiang Wu ,&nbsp;Jiang Liu ,&nbsp;Wei Huang ,&nbsp;Chaofang Dong","doi":"10.1016/j.ijrmhm.2024.106878","DOIUrl":"10.1016/j.ijrmhm.2024.106878","url":null,"abstract":"<div><p>The corrosion performance of WC-12Co after different post heat treatments (1100 °C, 1100 °C + 400 °C, 1100 °C + 500 °C, 1100 °C + 600 °C), were tested in 0.05 M H₂SO₄, 0.1 M Na₂SO₄, and 0.1 M NaOH. Heat treatments influence the corrosion performance of WC-12Co in acidic and neutral environments. However, the corrosion properties for WC-12CO in alkaline solutions are independent of the heat treatments. W and C diffuse to Co from the quenching process, dramatically improving corrosion resistance, with higher annealing temperature slightly reduces the corrosion performance. The rank of corrosion nucleation parameter tested by EIS and potentio-dynamic polarisation, with the corrosion expansion rate measured by potentio-static polarisation at +0.2 V_SCE, + 0.5 V_SCE, and + 0.8 V_SCE for 30 min are not the same. The corrosion mechanism tested in different pH values is analysed using SEM, XPS, and DFT calculations.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106878"},"PeriodicalIF":4.2,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142161870","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 laser beam shaping on the cracking behavior of tungsten at single weld lines","authors":"Thomas Stoll ,&nbsp;Maximilian Schmitt ,&nbsp;Lukas Lohr ,&nbsp;Robert Lürbke ,&nbsp;Alexander v Müller ,&nbsp;Tatu Pinomaa ,&nbsp;Jonas Grünewald ,&nbsp;Anssi Laukkanen ,&nbsp;Katrin Wudy ,&nbsp;Rudolf Neu","doi":"10.1016/j.ijrmhm.2024.106864","DOIUrl":"10.1016/j.ijrmhm.2024.106864","url":null,"abstract":"<div><p>In the state of-the art, Tungsten (W) as a crack prone material in laser processing is being investigated with different approaches that influence the cooling behavior and thermomechanical conditions during processing. Investigations in the present paper analyze the application of laser beam shaping and, therefore, the adjustment and homogenization of the laser intensity input at single weld lines on pure tungsten sheets. Additionally, the laser beam size in the processing zone is varied by a factor of max. 1.9. Experiments show that the reduction of the peak laser intensities, in the range of 9,120–9,600 kW/cm² at ring-shaped beam profiles, compared to laser intensities in the region of maximal 47,200 kW/cm² at Gaussian beam profiles result in a significant crack reduction and crack avoidance. Also contributing to the crack reduction is the emerging equiaxed solidification morphology in the fusion zone at applied ring-shaped beam profiles and at the enlargement of the Gaussian beam profile. Resulting lower laser intensities at larger beam profiles at a magnification factor of 1.9 at the ring-shaped beam profile and the Gaussian beam profile show, besides the crack avoidance, a high potential for a process speed enhancement at Powder Bed Fusion of Metals using a laser-based system (PBF-LB/M) in future applications. Therefore, concerning the melt pool geometry and the emerging microstructure, the Gaussian and ring-shaped beam profile at a comparable beam diameter show similar results. Due to the severe enlargement of the melt pool width at a decent penetration depth at aspect ratios d/w &lt; 0.5 in the conduction welding regime, adapted beam profiles can, therefore, drastically influence the cooling behavior with reduced cracking as well as enhance the process speed and eliminate process faults like keyhole porosity.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106864"},"PeriodicalIF":4.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0263436824003123/pdfft?md5=a441b3b3b3b298d49fd9ae0305ac0640&pid=1-s2.0-S0263436824003123-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229368","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":"Process control of laser melting deposition for AlMo0.5NbTa0.5TiZr refractory high-entropy alloys and its impact on forming quality","authors":"Bingbing Sun ,&nbsp;Yan Wang ,&nbsp;Yu Wu ,&nbsp;Lingti Kong ,&nbsp;Jinfu Li","doi":"10.1016/j.ijrmhm.2024.106865","DOIUrl":"10.1016/j.ijrmhm.2024.106865","url":null,"abstract":"<div><div>AlMo0.5NbTa0.5TiZr is a novel class of lightweight refractory high-entropy alloy with exceptional strength at elevated temperatures. It has garnered significant attention as a high-temperature structural material in recent times. In this research, laser melting deposition technology was used to manufacture AlMo0.5NbTa0.5TiZr RHEAs. The impact of process variables on the forming quality of LMD-shaped AlMo0.5NbTa0.5TiZr RHEAs was examined using the single-factor approach. According to the study, the laser power had the most significant effect on the penetration depth during the single-pass forming process. In contrast, the scanning speed had the most significant effect on the deposited layer's height. In multi-pass forming, under the appropriate overlap ratio (50 % to 45 %), laminar flow heat and mass transfer characteristics were observed between passes, resulting in a lower surface waviness of the deposited layer samples and no obvious pores or other defects within the deposited layer. Preheating the substrate can reduce the number of cracks and pores in the multi-layer three-dimensional samples of AlMo0.5NbTa0.5TiZr RHEAs.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106865"},"PeriodicalIF":4.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316269","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":"The impact of BBr3/TiCl4 ratios on the microstructural and mechanical characteristics of TiBN coatings deposited using a pulsed-PACVD technique","authors":"Meisam Mahdavi ,&nbsp;Amir Abdollah-Zadeh ,&nbsp;Hassan Elmkhah","doi":"10.1016/j.ijrmhm.2024.106851","DOIUrl":"10.1016/j.ijrmhm.2024.106851","url":null,"abstract":"<div><p>This study aimed to investigate the impact of precursor ratios on both the microstructural and tribological characteristics of TiBN coatings. Using the PACVD process, TiN, TiB₂, and three variations of TiBN coatings with adjusted BBr₃/TiCl₄ ratios were applied onto H13 substrates. The coatings were characterized using XRD, FESEM, TEM, AFM, nanoindentation, and nanoscratch methods to analyze their microstructural properties, surface morphology, and mechanical behavior. The findings revealed that the TiBN coatings possessed a nanocomposite structure with TiN crystals dispersed within the BN matrix, which is amorphous. Moreover, the augmentation of the BBr₃/TiCl₄ ratio from 0 to 1/3 resulted in a significant rise in the hardness value, from 13.4 GPa to 25.7 GPa. However, a further increase in the ratio from 1/3 to 3/3 resulted in a decrease in hardness to 14.4 GPa because cracks were formed in the deposited coating. In comparison, the TiB₂ coating exhibited a higher hardness of 19.7 GPa due to strong Ti<img>B bonds within the coating. The TiBN coating, applied with a BBr₃/TiCl₄ ratio of 1/3, demonstrated the lowest wear volume of 0.10 × 10⁻¹⁸ m³, attributed to its higher hardness and smoother surface texture.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106851"},"PeriodicalIF":4.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142135930","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 ultra-high temperature treatment on the rolled pure molybdenum for nuclear thermal propulsion","authors":"Lihua Guo ,&nbsp;Linyuan Lu ,&nbsp;Guoqiang Wang ,&nbsp;Jinpeng Zhang","doi":"10.1016/j.ijrmhm.2024.106863","DOIUrl":"10.1016/j.ijrmhm.2024.106863","url":null,"abstract":"<div><p>Molybdenum (Mo)-based uranium dioxide (UO₂) fuel is considered one of the most promising fuel forms for deep-space exploration. The rolling process has been proposed for the preparation of Mo matrix due to its excellent performance. However, there has been limited research on the ultra-high temperature stability of Mo matrix used in nuclear thermal propulsion (NTP). Therefore, in this study, annealing experiments were carried out on rolled Mo plates within a relatively wide temperature range of 1200 to 2300 °C for 1 h to investigate the effects of temperature on the phase composition, microstructure, and mechanical property. The results showed that, despite the body-centered cubic structure of the Mo plates remaining unchanged without undergoing phase transition after high-temperatures, the intensity of the crystal diffraction peaks experienced a significant increase. The preferred growth orientation shifted from the (110) direction at lower temperatures to the (200) direction at 2300 °C. The grain shape of the rolled Mo plates changed from elongated to equiaxed after annealing, and the grain size increased from the initial 1 μm to tens of microns. No discernible surface pores or fracture bubbles were observed when annealed at 1200 to 2100 °C. However, subsequent annealing at 2300 °C revealed a proliferation of polyhedral bubbles, ranging in size from tens of nanometers to several microns, distributed both in grain boundaries and within grains. Nevertheless, there is no apparent change in the density from 1200 to 2300 °C. Bright-field TEM micrographs show that after annealing at 2300 °C, the dislocation density is significantly reduced, and the dislocation shape evolves from screw dislocation to long and straight line. In addition, the Vickers hardness value of the rolled Mo plates undergoes a significant decrease, from 247.1 to 199.6 Hv, after annealing at 1200 °C. Subsequently, in the temperature range of 1200 to 2300 °C, a gradual decline in the hardness value is observed. This work will deepen our understanding of the high-temperature resistance of rolled Mo plates and provide data to support their applications in ultra-high-temperature conditions.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106863"},"PeriodicalIF":4.2,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142135931","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":"Evolution of NbC during laser welding and its impacts on the performance of molybdenum alloy joint","authors":"Miaoxia Xie ,&nbsp;Xintao Ren ,&nbsp;Long Zhang ,&nbsp;Chengyu Xiang ,&nbsp;Linjie Zhang","doi":"10.1016/j.ijrmhm.2024.106862","DOIUrl":"10.1016/j.ijrmhm.2024.106862","url":null,"abstract":"<div><p>Influences of addition of niobium carbide (NbC) in the fusion zone (FZ) on room-temperature and high-temperature mechanical properties of laser-welded joints of molybdenum (Mo) alloys were studied. Results show that after adding NbC powder, the average Vickers microhardness in the upper part of the FZ increases from 183.0 HV to 712.3 HV; the room-temperature tensile strength grows from 33.9 MPa to 323.1 MPa, reaching 45.4 % that of base metal (BM). In addition, the fracture mode of joints turns from intergranular fractures into transgranular fracture; at 1100 °C, the high-temperature tensile strength of joints added with NbC is 141.6 MPa, which is 65.9 % that of BM. Energy dispersive spectrometer (EDS) and electron backscattered diffraction (EBSD) results show that after adding NbC powder, the average grain size in the FZ diminishes from 40.3 μm to 32.9 μm, where the number of low-angle grain boundaries (LAGBs) increases; the FZ not only contains NbC phase but also a large quantity of Nb₂O₅ and Mo₂C phases dispersed on grain boundaries (GBs), and the number of MoO₂ phase on GBs decreases apparently. Therefore, physical mechanisms underlying significant improvement of room-temperature and high-temperature tensile strengths of laser-welded joints of Mo alloys added with NbC in the FZ mainly include fine-grain strengthening, GB purification, and GB strengthening.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106862"},"PeriodicalIF":4.2,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151092","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":"A new type of high thermal shock resistance tool for inhibiting thermal crack","authors":"Limei Wang ,&nbsp;Hanlian Liu ,&nbsp;Chuanzhen Huang ,&nbsp;Xiangyu Wang ,&nbsp;Yang Qiao ,&nbsp;Xiuli Fu ,&nbsp;Jintao Niu","doi":"10.1016/j.ijrmhm.2024.106861","DOIUrl":"10.1016/j.ijrmhm.2024.106861","url":null,"abstract":"<div><p>Due to the periodic alternation of hot and cold in the cutting process, cutting tools often fail owing to thermal cracks, making it difficult to intermittently cutting materials. Therefore, in order to suppress the initiation of thermal cracks in cutting tools, a new type of high thermal shock resistance oblique gradient cutting tool (marked as TDZ-X) has been fabricated. The material system of the cutting tool is designed by the temperature field model of the cutting tool. The direction angle of TDZ-X is accurately designed based on the thermal crack initiation area of the tool. A new method for studying the thermal fatigue properties of tool materials is proposed, the tool is heated by ultra-fast picosecond laser to simulate the thermal shock in the milling process. The thermal fatigue resistance and the thermal shock resistance of TDZ-X, the gradient tool and the homogeneous tool are compared and studied, the results show those of TDZ-X are best than those of the other two tool materials. Through the design of TDZ-X, the thermal shock resistance of the tool material has been significantly improved, and the effectiveness of inhibiting thermal crack initiation has been verified by cutting experiments, which provides a new method for design and fabrication of discontinuous cutting tools with long tool life and high reliability.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106861"},"PeriodicalIF":4.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142135929","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 property characteristics in hot-pressed Mo-W-Cu refractory functional alloys with varying tungsten content","authors":"Qilong Liu ,&nbsp;Bingbo Niu ,&nbsp;Lingge Liu ,&nbsp;Runze Ren ,&nbsp;Jinbo Ni ,&nbsp;Ning Luo ,&nbsp;Qingkui Li ,&nbsp;Jilin He","doi":"10.1016/j.ijrmhm.2024.106859","DOIUrl":"10.1016/j.ijrmhm.2024.106859","url":null,"abstract":"<div><p>Mo-W-Cu refractory functional alloys (RFAs), combining property advantages of Mo<img>Cu and W<img>Cu alloys, have great application potential in microelectronics, aerospace technology, and military equipment due to their excellent electrical and thermal conductivity, low coefficient of thermal expansion, and high-temperature properties. W content in the alloy is a key factor influencing these properties. However, there is a lack of systematic investigation on the microstructure and properties of hot pressing (HP) processed Mo-W-Cu RFAs with different W contents these days. In this study, Mo-W-20Cu alloys with varying W content of 0–50 wt% RFAs are prepared by mechanical activation (MA) followed by hot pressing. The effect of W content on the microstructure and properties of the alloy is investigated in detail. The results show that all Mo-W-Cu RFAs mainly consist of Mo phase, W phase, and Cu phase after adding W. The microstructure observation shows that the Cu powder particles undergo a plastic deformation during the HP processing, resulting in the closure of the pores and the good metallurgical bonding with Mo phase and W phase at a relatively low temperature. Transmission electron microscopy (TEM) determination indicates that the Mo<img>Cu phase interface and that of W<img>Cu both possess a semi-coherent structure. The property measurements demonstrate that the electrical and thermal conductivity properties of Mo-W-Cu RFAs continuously increase with W content rising while the relative densities of all the alloys are over 94 %. This study can provide a valuable theoretical and technological guidance for the investigation on preparation, microstructure, and properties of high-performance RFAs.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106859"},"PeriodicalIF":4.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151143","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":"Effects of raw materials on microstructure and mechanical properties of second phase particles reinforced WRe composites","authors":"L.H. Lou ,&nbsp;L. Gao ,&nbsp;R. Li ,&nbsp;J.P. Song ,&nbsp;P. Chen ,&nbsp;B.Z. Sun ,&nbsp;Y.L. Liu ,&nbsp;Y. Qi","doi":"10.1016/j.ijrmhm.2024.106860","DOIUrl":"10.1016/j.ijrmhm.2024.106860","url":null,"abstract":"<div><p>Combined strengthening of micron and nanoscale second phase particles is of great significance for improving the comprehensive properties of tungsten (W) based refractory alloys. In this work, with the addition of raw HfC, HfH₂ and carbon powders, three types of W-3 wt%Re-0.3 wt%HfC (WRH) composites were fabricated by powder metallurgy and rotary swaging. The microstructure and mechanical properties of three WRH samples were investigated comparatively. Results show that three WRH samples are constituted by W matrix, HfO₂ and HfC second phase particles. When HfH₂ powder is served as the raw material, the obtained two kinds of composites show the microstructure configuration with a micro-nano combined second phase particles. That is, some larger HfO₂ particles are located at the matrix grain boundaries and fine nanoscale HfC particles are inside W matrix grains. Based on it, both composites exhibit the better overall performance. When the carbon powder ratio reaches 0.03 wt%, WRH composite shows the smallest average matrix grain size and a smaller size of second phase particles inside the matrix grains, and thereby gaining the better ultimate tensile strength and hardness. As carbon powder ratio rises to 0.07 wt%, WRH sample presents an excellent elongation. Besides, the formation mechanisms of HfO₂ and HfC particles, as well as the correlation between microstructure and mechanical properties, were discussed particularly.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"124 ","pages":"Article 106860"},"PeriodicalIF":4.2,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097908","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 Cr addition on the microstructure and mechanical properties of MoNbVTa0.5Crx refractory high-entropy alloys","authors":"Mingyi Guo ,&nbsp;Liujie Xu ,&nbsp;Lin Qi ,&nbsp;Yunchao Zhao ,&nbsp;Zhou Li ,&nbsp;Shizhong Wei","doi":"10.1016/j.ijrmhm.2024.106857","DOIUrl":"10.1016/j.ijrmhm.2024.106857","url":null,"abstract":"<div><p>To increase strength and decrease density of traditional refractory high-entropy alloys (RHEAs), the MoNbVTa_0.5Cr_x RHEAs were synthesized by mechanical alloying (MA) and spark plasma sintering (SPS). The effect of Cr content on microstructure and mechanical properties of the MoNbVTa_0.5Cr_x RHEAs was systematically studied. The results showed the addition of Cr could refine the microstructure, decrease density and increase strength of RHEAs. The microstructure of the sintered alloy was composed of BCC phase and a small amount of oxide phase (Ta₂VO₆), and Ta₂OV₆ (200) has a semi-coherent relationship with BCC phase (110), with a lattice mismatch degree of 7.34 %. The compressive yield strength of the MoNbVTa_0.5Cr_x RHEAs initially increased and then decreased with increasing Cr content. The MoNbVTa_0.5Cr_0.75 RHEAs demonstrated the best mechanical properties, and the compressive yield strength and ultimate compressive strength at room temperature were 3180 MPa and 3596 MPa, respectively, which were far higher than traditional WNbMoTaV RHEAs. And the density of MoNbVTa_0.5Cr_0.75 RHEAs was 21 % lower than that of sintered WNbMoTaV RHEAs. The strengthening mechanism of sintered MoNbVTa_0.5Cr_x RHEAs involved O/C atoms interstitial solid solution strengthening, grain boundary strengthening, and metal atoms solid solution strengthening, while the contribution of oxide precipitation strengthening was negligible.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"124 ","pages":"Article 106857"},"PeriodicalIF":4.2,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142088276","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}