| High performance and low thermal expansion in Er-Fe-V-Mo dual-phase alloys | |
| Lin, Kun1,2; Li, Wenjie1,2; Yu, Chengyi1,2; Jiang, Suihe1,2; Cao, Yili1,2; Li, Qiang1,2; Chen, Jun1,2; Zhang, Minghe1,2; Xia, Min1,2; Chen, Yan3; An, Ke3; Li, Xiaobing4; Zhang, Qinghua5; Gu, Lin5; Xing, Xianran1,2 | |
| Corresponding Author | Xing, Xianran(xing@ustb.edu.cn) |
| 2020-10-01 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 198Pages:271-280 |
| Abstract | Low thermal expansion alloy plays a unique role in high precision instruments and devices owing to its size stability under thermal shocks. However, a low thermal expansion generally produces a poor mechanical performance, such as brittleness and low fracture resistance, which is a bottle-neck for their applications as functional materials. Here, we demonstrate a novel intermetallic compound-based dual phase alloy of Er-Fe-V-Mo with excellent structural and functional integrity achieved by precipitating a ductile phase in the hard-intermetallic matrix with large magnetovolume effect. It is found that the compound with 12.8 +/- 0.1vol% precipitate phase improves the alloy's strength and toughness by one order of magnitude, while keeping a low bulk coefficient of thermal expansion (1.87 +/- 0.02 x 10(-6) K-1) over a wide temperature range (100 to 493 K). The combined analyses of real-time in-situ neutron diffraction, synchrotron X-ray diffraction, and microscopy reveal that both the thermal expansion and the mechanical properties of the precipitate phase are coupled with the matrix phase via semi-coherent interfacial constraint; more importantly, the precipitate phase undergoes a pronounced strain hardening with dislocation slips, which relieves the stress localization and thus hinders the microcrack propagation in the intermetallic matrix. Moreover, the alloys are easy to fabricate and stable during thermal cycling with great application potentials. This study shed light on the development of low thermal expansion alloys as well as the implications to other high-performance intermetallic-compound-based material design. (c) 2020 Published by Elsevier Ltd on behalf of Acta Materialia Inc. |
| Keyword | Low thermal expansion Magnetovolume effect Crystal structure Neutron diffraction Mechanical properties Intermetallic compound |
| Funding Organization | National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; Fundamental Research Funds for the Central Universities, China |
| DOI | 10.1016/j.actamat.2020.08.012 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[21971009] ; National Natural Science Foundation of China[21701008] ; National Natural Science Foundation of China[21590793] ; National Natural Science Foundation of China[21731001] ; National Postdoctoral Program for Innovative Talents[BX201700027] ; Fundamental Research Funds for the Central Universities, China[FRF-IDRY-19-018] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000567798300011 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/140456 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xing, Xianran |
| Affiliation | 1.Univ Sci & Technol Beijing, Inst Solid State Chem, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China 2.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China 3.Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN USA 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Lin, Kun,Li, Wenjie,Yu, Chengyi,et al. High performance and low thermal expansion in Er-Fe-V-Mo dual-phase alloys[J]. ACTA MATERIALIA,2020,198:271-280. |
| APA | Lin, Kun.,Li, Wenjie.,Yu, Chengyi.,Jiang, Suihe.,Cao, Yili.,...&Xing, Xianran.(2020).High performance and low thermal expansion in Er-Fe-V-Mo dual-phase alloys.ACTA MATERIALIA,198,271-280. |
| MLA | Lin, Kun,et al."High performance and low thermal expansion in Er-Fe-V-Mo dual-phase alloys".ACTA MATERIALIA 198(2020):271-280. |
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