摘要
设计并使用真空电弧炉制备了Ni_(x)Ti_(24)Zr_(12)Nb_(10)Ta_(12)Mo_(5)W_(5)(x=5, 10, 15, 20, 32, 35)高熵合金含能结构材料。采用XRD、EPMA、万能试验机等手段研究了不同Ni含量下合金的相组成、微观组织及力学性能。结果表明,随着Ni含量增加,合金的微观组织由BCC1+BCC2+Ni_(10)Zr_(7)+Unknown四相结构转变为BCC1+BCC2+Ni_(10)Zr_(7)+Unknown+FCC五相结构;当x=20时合金呈现出最佳的强塑性匹配,屈服强度为1 653 MPa,压缩伸长率约为19%;随着Ni含量增加,合金硬度先升高后降低,当x=20时合金硬度(HV)达到最大值为592。
The Ni_(x)Ti_(24)Zr_(12)Nb_(10)Ta_(12)Mo_(5)W_(5)(x=5,10,15,20,32,35) high-entropy alloys(HEAs) energetic structural material was designed and fabricated by vacuum arc furnace. The phase composition, microstructure and mechanical properties of alloys with different Ni contents were investigated by XRD, EPMA and universal testing machine. The results indicate that with the increase of Ni contents, the microstructure of the alloy is transformed from BCC1+BCC2+Ni_(10)Zr_(7)+Unknown to BCC1+BCC2+Ni_(10)Zr_(7)+Unknown+FCC phases. When x=20, the alloy presents desirable strength-plasticity combination, where the yield strength is 1 653 MPa, and the elongation is 19%.With the increase of Ni content, the Vickers hardness value of the alloy is firstly increased and then decreased, which reaches a maximum of 592 HV when x=20.
作者
魏祥赛
许鼎锋
卢一平
曹志强
王同敏
李廷举
Wei Xiangsai;Xu Dingfeng;Lu Yiping;Cao Zhiqiang;Wang Tongmin;Li Tingju(Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology)
出处
《特种铸造及有色合金》
CAS
北大核心
2023年第2期220-225,共6页
Special Casting & Nonferrous Alloys
基金
“国家磁约束聚创新2025”重大专项基金资助项目(2019B10086)。
关键词
高熵合金
微观结构
力学性能
硬度
High-entropy Alloys
Microstructure
Mechanical Properties
Hardness
