|
| C合金化对AlCrFeCoNi2.1共晶高熵合金微观组织和拉伸性能的影响 |
| Effect of C Alloying on Microstructure and Tensile Properties of AlCrFeCoNi2.1 Eutectic High Entropy Alloy |
| |
| DOI：10.3969/j.issn.1674-6457.2022.08.021 |
| 中文关键词: 共晶高熵合金 相结构 微观组织 拉伸性能 |
| 英文关键词: eutectic high entropy alloys phase structure microstructure tensile properties |
| 基金项目:国家自然科学基金(51971099) |
| Author Name | Affiliation | | CHE Lu-chang | No.59 Research Institute of China Ordnance Industry, Chongqing 400039, China | | LIU Jun | No.59 Research Institute of China Ordnance Industry, Chongqing 400039, China | | PENG Fei-fei | No.59 Research Institute of China Ordnance Industry, Chongqing 400039, China | | XIONG Huan | No.59 Research Institute of China Ordnance Industry, Chongqing 400039, China | | ZHANG Fei-yue | No.59 Research Institute of China Ordnance Industry, Chongqing 400039, China | | MA Xian-neng | School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China | | GAO Niu | School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China | | LIU Xin-wang | School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
|
| Hits: 2096 |
| Download times: 987 |
| 中文摘要: |
| 目的 为了显著提高AlCrFeCoNi2.1共晶高熵合金的室温力学性能，利用C合金化的方法研究不同碳含量对微观组织和室温拉伸性能的作用规律。方法 采用电弧熔炼–滴铸方法制备了不同C含量的(AlCrFeCoNi2.1)–x%C(x=0、1、2、3，原子数分数)共晶高熵合金，利用XRD、SEM和EDS等手段研究了不同C含量下微观组织、相结构和拉伸性能的变化规律。结果 添加C元素后，合金未形成新相，仍然由FCC相和B2相组成，但其微观组织呈现出由层片状向树枝晶转变的特征。随着C含量的增加，屈服强度和抗拉强度增大，但伸长率有一定的降低，其中(AlCrFeCoNi2.1)–3%C(原子数分数)合金的屈服强度可达到791 MPa，抗拉强度可达到1 332 MPa，同时伸长率仍有6.1%，与AlCrFeCoNi2.1合金相比，屈服强度和抗拉强度分别提高了99 MPa和296 MPa。结论 该强化效果主要来源于C原子的固溶强化作用和微观结构的改变。 |
| 英文摘要: |
| The work aims to study the effects of different C contents on microstructure and tensile properties at room temperature by C alloying, so as to significantly improve the mechanical properties of AlCrFeCoNi2.1 eutectic high entropy alloy at room temperature. (AlCrFeCoNi2.1)-x%C (x=0, 1, 2, 3, atomic fraction) eutectic high entropy alloys with different C contents were prepared by vacuum arc melting followed by drop casting. The changes of microstructure, phase structure and tensile properties under different C contents were studied by XRD, SEM, EDS, etc. With the addition of C element, the alloy did not form a new phase, and was still composed of FCC phase and B2 phase, but the microstructures transformed from lamellar to dendritic features. With the increase of C content, both the yield strength and ultimate tensile strength increased, but the elongation decreased. The yield strength, ultimate tensile strength and elongation of the (AlCrFeCoNi2.1)-3%C (atomic fraction) alloy reached 791 MPa, 1 332 MPa and 6.1%, respectively. Compared with the AlCrFeCoNi2.1 alloy, the yield strength and tensile strength were increased by 99 MPa and 296 MPa, respectively. The strengthening effect is mainly due to the interstitial solution strengthening and the change of microstructures by addition. |
|
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
渝公网安备 50010702501719号