Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengthening
In this study, (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) high entropy alloys were fabricated by vacuum arc melting, followed by cold rolling and aging treatment. The effects of refractory elements on the phase structure, microstructure and mechanical properties of high entropy alloys (HEA...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522006839 |
| _version_ | 1811206369348419584 |
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| author | Jijie Yang Chaojie Liang Chenglei Wang Jian Huang Bing Qiu Mulin Liang Weijie Liu Yingguang Xie Kexiang Zhang Shengfeng Zhou |
| author_facet | Jijie Yang Chaojie Liang Chenglei Wang Jian Huang Bing Qiu Mulin Liang Weijie Liu Yingguang Xie Kexiang Zhang Shengfeng Zhou |
| author_sort | Jijie Yang |
| collection | DOAJ |
| description | In this study, (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) high entropy alloys were fabricated by vacuum arc melting, followed by cold rolling and aging treatment. The effects of refractory elements on the phase structure, microstructure and mechanical properties of high entropy alloys (HEAs) were systematically studied by means of XRD, SEM and TEM. The results show that the phase composition of all alloys is the face-centered-cubic (FCC) + L12 dual-phase structure, and the addition of refractory elements has not changed the phase structure of the alloys. The tensile results show that the yield strength and elongation of the matrix HEA are 750 MPa and 18 %, respectively. The strength of HEAs is improved variously by adding refractory elements. The HEAs with Ta element have the best comprehensive mechanical properties, exhibit excellent strength-ductility combination, with the yield strength and elongation of 950 MPa and 20 %, respectively, and the fracture mechanism changes from complete ductile fracture to mixed brittle-ductile fracture mode. In addition, the HEAs have multi-stage strain-hardening behavior, which has higher strength when the strain-hardening curve has larger fluctuations, which indicates that the HEAs can improve the strength-plasticity matching relationship by a multi-stage strain hardening behavior. |
| first_indexed | 2024-04-12T03:47:28Z |
| format | Article |
| id | doaj.art-50f00f16e6b044de9ebe026375f25f57 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-12T03:47:28Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-50f00f16e6b044de9ebe026375f25f572022-12-22T03:49:06ZengElsevierMaterials & Design0264-12752022-10-01222111061Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengtheningJijie Yang0Chaojie Liang1Chenglei Wang2Jian Huang3Bing Qiu4Mulin Liang5Weijie Liu6Yingguang Xie7Kexiang Zhang8Shengfeng Zhou9School of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR ChinaSchool of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR China; School of Materials Science and Engineering, Central South University, Hunan, Changsha 410083, PR ChinaSchool of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR China; Corresponding authors.The 34th Research Institute of China Electronics Technology Group Corporation, Guangxi, Guilin 541004, PR China; Corresponding authors.School of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR China; Corresponding authors.School of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR ChinaSchool of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR ChinaSchool of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR ChinaSchool of Materials Science and Engineering, and Guangxi Key Laboratory of Information Materials, and Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guangxi, Guilin 541004, PR ChinaInstitute of advanced wear & corrosion resistance and functional materials, Jinan University, Guangdong, Guangzhou 510632, PR ChinaIn this study, (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) high entropy alloys were fabricated by vacuum arc melting, followed by cold rolling and aging treatment. The effects of refractory elements on the phase structure, microstructure and mechanical properties of high entropy alloys (HEAs) were systematically studied by means of XRD, SEM and TEM. The results show that the phase composition of all alloys is the face-centered-cubic (FCC) + L12 dual-phase structure, and the addition of refractory elements has not changed the phase structure of the alloys. The tensile results show that the yield strength and elongation of the matrix HEA are 750 MPa and 18 %, respectively. The strength of HEAs is improved variously by adding refractory elements. The HEAs with Ta element have the best comprehensive mechanical properties, exhibit excellent strength-ductility combination, with the yield strength and elongation of 950 MPa and 20 %, respectively, and the fracture mechanism changes from complete ductile fracture to mixed brittle-ductile fracture mode. In addition, the HEAs have multi-stage strain-hardening behavior, which has higher strength when the strain-hardening curve has larger fluctuations, which indicates that the HEAs can improve the strength-plasticity matching relationship by a multi-stage strain hardening behavior.http://www.sciencedirect.com/science/article/pii/S0264127522006839High-entropy alloysMicrostructureMulti-stage strain hardeningStrengthening mechanism |
| spellingShingle | Jijie Yang Chaojie Liang Chenglei Wang Jian Huang Bing Qiu Mulin Liang Weijie Liu Yingguang Xie Kexiang Zhang Shengfeng Zhou Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengthening Materials & Design High-entropy alloys Microstructure Multi-stage strain hardening Strengthening mechanism |
| title | Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengthening |
| title_full | Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengthening |
| title_fullStr | Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengthening |
| title_full_unstemmed | Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengthening |
| title_short | Improving mechanical properties of (Co1.5FeNi)88.5Ti6Al4R1.5 (R = Hf, W, Nb, Ta, Mo, V) multi-component high-entropy alloys via multi-stage strain hardening strengthening |
| title_sort | improving mechanical properties of co1 5feni 88 5ti6al4r1 5 r hf w nb ta mo v multi component high entropy alloys via multi stage strain hardening strengthening |
| topic | High-entropy alloys Microstructure Multi-stage strain hardening Strengthening mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522006839 |
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