Intermetallics最新文献

{"title":"Achieving high performance HPS TiAl based alloy by adjusting sintering process parameters to eliminate heterogeneous microstructure and original powder boundaries","authors":"Chengcheng Shi ,&nbsp;Yongkang Liu ,&nbsp;Yuelong Yuan ,&nbsp;Dekai Liu ,&nbsp;Rui Liu ,&nbsp;Zhen Lu ,&nbsp;Nana Guo ,&nbsp;Jinzhao Sun","doi":"10.1016/j.intermet.2025.108784","DOIUrl":"10.1016/j.intermet.2025.108784","url":null,"abstract":"<div><div>The influence of sintering parameters on the microstructural evolution and mechanical properties of Ti-46.5Al-2Cr-1.8Nb-0.2W-0.15B (at.%) alloys fabricated via hot press sintering by adopting pre-alloyed powders are investigated in detail. The results indicated that the alloys were composed of heterogeneous microstructure caused by localized recrystallization and original powder boundaries (OPBs), when densified at insufficient sintering parameters. Hence, the alloys cracked at the interface of heterogeneoum icrostructure or OPBs due to the discontinuity of deformation, resulting in a relative low mechanical property at 800 °C and the hot workability. With increasing the sintering temperature and holding time to 1300 °C and 120min, respectively, the OPBs and heterogeneous microstructure faded away, and the fracture mechanism transformed into micro-void development at the interfaces of deformation twin groups and the DRX grains, which lead to the increase of plasticity. Further increasing the sintering temperature or holding time, the comprehensive mechanical properties decreased due to the coarsening of microstructure. Therefore, the optimal sintering parameters were considered as sintering at 1300 °C with a holding time of 120min. This research can provide a scientific reference for the preparation of high-performance TiAl based alloys by powder metallurgy method.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108784"},"PeriodicalIF":4.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829885","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 and mechanical properties of Tribaloy T-800/WC composite coatings deposited on DZ125 directionally solidified alloy by laser cladding","authors":"Xiaowen Xu ,&nbsp;Hongyou Bian ,&nbsp;Weijun Liu ,&nbsp;Fei Xing ,&nbsp;Boxue Song","doi":"10.1016/j.intermet.2025.108788","DOIUrl":"10.1016/j.intermet.2025.108788","url":null,"abstract":"<div><div>Addition of WC ceramic particles is an effective method to improve mechanical properties of coatings. To improve the wear properties of the T-800 alloy coating, Tribaloy T-800 and Tribaloy T-800/WC composite coatings are deposited on the DZ125 alloy by laser cladding. The influence mechanisms of WC contents (0 wt%, 5 wt%, 10 wt%) on the precipitation behavior of the Laves phase (Co₃Mo₂Si) and secondary phases, microhardness, and wear performance are systematically studied. The results show that the addition of WC promotes an increase in the Laves phase content and size reduction as well as an improvement in the dislocation density of the composite coating. As the WC content is increased from 0 wt% to 10 wt%, the Laves phase content increases from 30.5 % to 45.5 %, the average size reduces from 10.2 μm to 10.3 μm and the average KAM value rises from 0.58° to 0.81°. Moreover, after the addition of WC, additional WC phase, W₂C phase and Co₆Mo₆C phase appear in the composite coating, and the content of these secondary phases shows an upward trend with increasing WC content. The microhardness and wear properties of the composite coating are significantly improved by the evolution of the microstructure. The microhardness and wear properties of the composite coating are optimized when the WC content is 10 wt%. Compared to the coating without WC, the composite coating with 10 wt% WC increases the microhardness by 18.3 % and reduces the wear mass loss by 37.9 %.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108788"},"PeriodicalIF":4.3,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824703","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":"Simultaneously improving the plasticity and corrosion resistance of biomedical Mg-based bulk metallic glass by introducing SnZn alloy solder","authors":"Shujian Zhou ,&nbsp;Shilu Chen ,&nbsp;Peng Du ,&nbsp;Rongqiang Yan ,&nbsp;Bo Yuan ,&nbsp;Zeyun Cai ,&nbsp;Liang Zhang ,&nbsp;Guoqiang Xie","doi":"10.1016/j.intermet.2025.108791","DOIUrl":"10.1016/j.intermet.2025.108791","url":null,"abstract":"<div><div>The inherent brittleness and unideal degradation rate of Mg-Zn-Ca bulk metallic glass (BMG) pose significant challenges for its application as degradable biomaterials. To address this issue, we introduced a non-toxic, highly ductile Sn-Zn alloy as a secondary phase within the powder metallurgy Mg-Zn-Ca BMG, resulting in a notable enhancement in plasticity. This study further investigates the impact of the Sn-Zn reinforced phase on the corrosion behavior of the BMG in Hank's solution. Our findings reveal that the Mg-Zn-Ca/Sn-Zn BMG composite not only surpasses the corrosion resistance of the Mg-Zn-Ca BMG, but also ranks among the most advanced biomedical Mg alloys reported to date. Importantly, the Mg-Zn-Ca/Sn-Zn BMG composite retains adequate strength and plasticity even after extended degradation, marking a significant advancement in the development of large-scale Mg-based medical metallic glasses.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108791"},"PeriodicalIF":4.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821377","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":"Crystallization-resistant water-jet guided laser processing of Cu46Zr46Al8 amorphous alloy via thermally suppressed strategy","authors":"Hengming Hu ,&nbsp;Caiyun Liu ,&nbsp;Zihuai Su ,&nbsp;Feng Ye ,&nbsp;Bin Qian ,&nbsp;Ye Dai ,&nbsp;Shengzhi Sun ,&nbsp;Binbin Liu ,&nbsp;Jianrong Qiu","doi":"10.1016/j.intermet.2025.108789","DOIUrl":"10.1016/j.intermet.2025.108789","url":null,"abstract":"<div><div>The unique atomic packing of amorphous alloys leads to excellent properties, but the metastable amorphous nature becomes an obstacle of the processing. This study introduces Water-Jet Guided Laser (WJGL) technology to process the Cu₄₆Zr₄₆Al₈ amorphous alloy with improved surface morphology and minimal heat-affected zone. A noticeable heat-affected zone with thickness larger than 2 mm was observed in sample processed by conventional laser, while that of WJGL processing was less than 15 μm. The processing parameters of WJGL have no significant effect on the phases of the processed surface, only <em>m</em>-ZrO₂, <em>t</em>-ZrO₂, and Cu were determined. The processing surface morphology shows a strong dependence on the water pressure. Wave-like morphology formed in the processing surfaces under a water pressure of 30 MPa, which was invisible as the water pressure decreased to 10 MPa. Smaller water pressure together with lower laser power are beneficial to the surface quality, the minimum surface roughness of 0.8411 μm was obtained at the water pressure of 10 MPa and the laser power of 8 W. Finally, complex-shaped components were processed using WJGL, indicating that WJGL is a viable and effective alternative for machining amorphous alloys.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108789"},"PeriodicalIF":4.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799060","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 Nb addition on the microstructure and martensitic transformation in NiTiHf-based high-temperature shape memory alloys","authors":"Bing Liu ,&nbsp;Xiangjun Zhou ,&nbsp;A.V. Shuitcev ,&nbsp;Mehrdad Zarinejad ,&nbsp;Yunxiang Tong","doi":"10.1016/j.intermet.2025.108790","DOIUrl":"10.1016/j.intermet.2025.108790","url":null,"abstract":"<div><div>This study investigates the microstructure and martensitic transformation of (Ni_50.3Ti_49.7-yHf_y)_100-xNb_x (x = 0, 5, 10 at. %; y = 10, 15, 20,25 at. %) alloys. The findings reveal that Nb addition significantly influences the alloy's microstructure. In Nb-containing alloys, β-Nb phase emerges alongside B19′ martensite and the Ti₂Ni-type phase at room temperature. Notably, the β-Nb phase adopts a spherical morphology in the Hf_yNb₅ alloys, whereas it becomes strip-shaped in the Hf_yNb₁₀ alloys. Nb addition also affects key properties, leading to an increase in transformation temperature and transformation hysteresis, as well as enhancements in hardness, tensile strength, and elongation. Furthermore, increasing Hf content elevates the transformation temperature, attributed to a linear reduction in valence electron concentration (<em>C</em>_<em>v</em>), while also improving microhardness. These results provide critical insights into tailoring the properties of Ni-Ti-Hf-Nb alloys for advanced applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108790"},"PeriodicalIF":4.3,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792239","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":"Low activation Ti30V30Cr5Zr5Ta30-XWX refractory high entropy alloys with excellent mechanical properties and phase stability","authors":"Shunhua Chen ,&nbsp;Yazhou Tang ,&nbsp;Junsheng Zhang ,&nbsp;Xiaokang Yue ,&nbsp;Haidong Yang ,&nbsp;Huohong Tang ,&nbsp;Yucheng Wu","doi":"10.1016/j.intermet.2025.108780","DOIUrl":"10.1016/j.intermet.2025.108780","url":null,"abstract":"<div><div>Although refractory high entropy alloys (RHEAs) have the potential to serve as nuclear materials, designing a high-performance alloy that can simultaneously endure extreme environments, such as elevated temperatures and radiation exposure, remains a significant challenge. In this work, elements with high melting points and low activation characteristics are selected to design Ti₃₀V₃₀Cr₅Zr₅Ta_30-xW_x (x = 5, 10, 15, 20 at.%) RHEAs that exhibit good high-temperature strength and irradiation resistance. The phase structure, mechanical properties, deformation mechanisms, and irradiation resistance of the RHEAs were investigated and discussed. All the low-activation Ti₃₀V₃₀Cr₅Zr₅Ta_30-xW_x RHEAs exhibited excellent phase stability. Typically, the Ti₃₀V₃₀Cr₅Zr₅Ta₁₅W₁₅ RHEA exhibited a yield strength, specific yield strength, and plasticity of 1607 MPa, 172.42 MPa·cm³/g and 22.7 % respectively at room temperature. At 800 °C and 1000 °C, it still had a yield strength of 851 MPa and 558 MPa respectively. The high strength of the Ti₃₀V₃₀Cr₅Zr₅Ta₁₅W₁₅ RHEA was attributed to the solid solution strengthening mechanism, in which the W element played an important role. The deformation mechanism of Ti₃₀V₃₀Cr₅Zr₅Ta₁₅W₁₅ RHEA at both room temperature and elevated temperatures was primarily governed by dislocation slip. Using low-energy and high-flux He ions, the irradiation resistance of the Ti₃₀V₃₀Cr₅Zr₅Ta₂₀W₁₀ and Ti₃₀V₃₀Cr₅Zr₅Ta₁₅W₁₅ RHEAs were also investigated. They demonstrated better radiation resistance surpassed that of pure W, showing remained flat surface and stable phase structure.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108780"},"PeriodicalIF":4.3,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing the glass forming ability and soft magnetic properties of FeNiB nanocrystalline alloys through carbon addition","authors":"Qiuyu Sun ,&nbsp;Kun Zhang ,&nbsp;Suo Zhang ,&nbsp;Chen Chen ,&nbsp;Ran Wei ,&nbsp;Yongfu Cai ,&nbsp;Shaojie Wu ,&nbsp;Fushan Li ,&nbsp;Tan Wang","doi":"10.1016/j.intermet.2025.108781","DOIUrl":"10.1016/j.intermet.2025.108781","url":null,"abstract":"<div><div>Fe-based nanocrystalline alloys with high saturation magnetic flux density (<em>B</em>_s) show significant potential for electrical and electronic applications. However, their large-scale industrial production remains challenging due to limited glass forming ability (GFA). In this work, we systematically investigated the GFA, thermal stability and soft magnetic properties of Fe_85-xNi₂B₁₃C_x (x = 0, 1, 2, 3, 4) alloys. The experimental results indicated that appropriate carbon addition can significantly enhance both GFA and soft magnetic properties. Specially, when the carbon content exceeds 2 at. %, the as-spun alloy ribbons retain a fully amorphous structure at a wheel speed of 40 m/s. As the carbon content increases from 0 to 4 at. %, <em>T</em>_x1 rises from 628 K to 688 K and <em>T</em>_x2 increases from 748 K to 768 K, while the C2 alloy maintains a substantial Δ<em>T</em> over 104 K. After rapid annealing at 753 K for 6 s, the Fe₈₃Ni₂B₁₃C₂ alloy exhibits improved soft magnetic properties, achieving <em>B</em>_s of 1.87 T and <em>H</em>_c of 8.2 A/m. This research provides valuable insights into the development and practical industrial application of Fe-based soft magnetic nanocrystalline alloys with high <em>B</em>_s.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108781"},"PeriodicalIF":4.3,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792238","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":"Design of a new eutectic high-entropy/multicomponent alloy by a single experiment of electromagnetic directional crystallization and the verification method","authors":"Yongchao Xu ,&nbsp;Yun Lei ,&nbsp;Wenhui Ma ,&nbsp;Kangning Suo","doi":"10.1016/j.intermet.2025.108786","DOIUrl":"10.1016/j.intermet.2025.108786","url":null,"abstract":"<div><div>Eutectic high-entropy alloys (EHEAs) or eutectic multicomponent alloys have been widely studied recently owing to their unique microstructure and excellent properties; however, the accurate and efficient design of new EHEAs remains a great challenge. To solve this problem, based on the precipitation principle of phases in a eutectic alloy phase diagram, we propose using a single experiment of electromagnetic directional crystallization (EDC) to separate a non-eutectic alloy melt to design a new EHEA. A new EHEA, Al_17.74Co_12.02Cr_13.70Fe_11.65Ni_44.89, was successfully designed by separating a non-eutectic alloy melt, AlCoCrFeNi₃, into eutectic and non-eutectic parts. Similarly, another EHEA, Al_17.89Co_12.20Cr_13.28Fe_11.10Ni_45.52, was also designed by separating a near-eutectic alloy melt, Al_16.8Co_12.6Cr_13.8Fe_11.8Ni_45.1. In particular, a criterion to verify whether an alloy is eutectic has been proposed: the eutectic alloy melt cannot be separated into different parts by EDC, and the composition of the eutectic alloy ingot along the direction of the EDC must not change significantly. Based on this criterion, a single EDC experiment can be used to verify whether an alloy is eutectic or non-eutectic. In addition, EDC also has great potential in improving the properties of EHEAs. The ultimate tensile strength and elongation of the EDC Al_17.74Co_12.02Cr_13.70Fe_11.65Ni_44.89 ingot were 1192.0 MPa and 17.0 %, respectively, and those of EDC Al_17.89Co_12.20Cr_13.28Fe_11.10Ni_45.52 alloy ingot were 1225.6 MPa and 17.0 %, respectively. Both designed new EHEAs possess a good combination of strength and ductility.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108786"},"PeriodicalIF":4.3,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792240","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 Yb on the microstructure and oxidation behavior of TiAl alloy","authors":"Xiaoyan Zhang ,&nbsp;Shuai Wang ,&nbsp;Zhibin Zheng ,&nbsp;Juan Wang ,&nbsp;Kaihong Zheng ,&nbsp;Pengfei Gao ,&nbsp;Xiaohui Zhang ,&nbsp;Tiegang Luo","doi":"10.1016/j.intermet.2025.108787","DOIUrl":"10.1016/j.intermet.2025.108787","url":null,"abstract":"<div><div>The microstructure and oxidation behavior of Ti-45Al-0.3YbB₆ prepared by spark plasma sintering were investigated. The results showed that the addition of YbB₆ adjusted the ratio of the two phases (α₂-Ti₃Al and γ-TiAl) in the TiAl alloy and refined the grains to a great extent. The analysis of the oxidation experiments showed that the addition of YbB₆ improved the oxidation resistance of the TiAl alloy. This is mainly attributed to the following two reasons: On the one hand, YbB₆ caused significant grain refinement of the alloy organization and improved the adhesion between the generated oxide film and the substrate; on the other hand, YbB₆ reduced the concentration of alumina required for the formation of an alumina layer, thereby promoting the selective oxidation of aluminum and generating a dense alumina layer, which impeded the outward diffusion of titanium ions and the inward diffusion of oxygen ions, and thus reduced the oxidation rate of the alloy. In addition, the formation of alumina pins at the interface can also well improve the anti-flaking property of the oxide film.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108787"},"PeriodicalIF":4.3,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783875","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":"Development of rapid analysis technique for Al, Nb, and Cr in TiAl alloys using X-ray fluorescence","authors":"Tomohiro Nishimura,&nbsp;Takayuki Yamazoe,&nbsp;Yusuke Yamada,&nbsp;Chishu Ono,&nbsp;Takeo Miyamura,&nbsp;Hitoshi Ishida","doi":"10.1016/j.intermet.2025.108785","DOIUrl":"10.1016/j.intermet.2025.108785","url":null,"abstract":"<div><div>TiAl alloy is a lightweight heat-resistant material that is used in turbine wheels in automotive turbochargers and turbine blades in aircraft engines. If the composition of the molten metal can be analyzed during melting (rapid analysis) and controlled within the standard by composition adjustment, it is effective in reducing the ingot scrap. Therefore, in this study, we present to develop rapid analysis technique using XRF through the making of high-precision standard sample and calibration curve. The standard sample was made by combining CCIM and PAM. Using the standard sample, the calibration curve was made that could be used in the range of 27mass% to 34mass% of the Al composition. We had developed the rapid analysis technique that could narrowly control the Al composition to within the upper and lower limits of 0.2mass% with respect to the target Al composition.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"182 ","pages":"Article 108785"},"PeriodicalIF":4.3,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776966","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}