摘要
为了研究激光熔化沉积工艺对CrMnFeCoNi高熵合金微观组织与力学性能的影响,采用单向扫描和双向扫描两种沉积路线,分别在1000、1200和1400 W功率下制备出CrMnFeCoNi高熵合金。通过X射线衍射（XRD）、光学显微镜和力学拉伸实验等分析手段对CrMnFeCoNi高熵合金相组成、微观组织及力学性能进行了研究。研究结果表明：不同工艺参数条件下制备得到的CrMnFeCoNi高熵合金均为FCC单相固溶体结构;通过控制激光沉积功率,可调控CrMnFeCoNi高熵合金组织结构中柱状晶与等轴晶的比例;双向扫描工艺条件下制备得到的CrMnFeCoNi高熵合金具有更加均匀的组织以及更为优异的力学性能。
In order to study the effect of laser melting deposition process on microstructure and mechanical properties of CrMnFeCoNi high-entropy alloys, the CrMnFeCoNi high-entropy alloys were prepared by unidirectional scanning process and bidirectional scanning process at 1000 W, 1200 W and 1400 W, respectively. The phase composition, microstructure, and mechanical properties of the CrMnFeCoNi high-entropy alloys were studied by means of X-ray diffraction（XRD）, optical microscope and mechanical tensile test. The results show that the CrMnFeCoNi high-entropy alloy prepared under different process parameters are all FCC single-phase solid solution structure; and the ratio of columnar crystal and equiaxial crystal in the structure of the CrMnFeCoNi high-entropy alloys can be controlled by controlling the laser deposition power. The CrMnFeCoNi high-entropy alloy prepared under the bidirectional scanning process has more uniform microstructure and better mechanical properties.
作者
向硕
张雷
刘学
乐国敏
戴晓军
李强
李晋锋
XIANG Shuo;ZHANG Lei;LIU Xue;LE Guo-min;DAI Xiao-jun;LI Qiang;LI Jin-feng(School of Physics and Technology,Xinjiang University,Urumqi 830046,China;Institute of Materials,China Academy of Engineering Physics,Mianyang 621907,China;Institute of Chemical Materials.China Academy of Engineering Physics,Mianvanz 621907,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2018年第10期29-35,共7页
Transactions of Materials and Heat Treatment
基金
四川省科技计划项目(2018G20146)
攀枝花财政科技专项资金项目(2017CY-G-21)
关键词
高熵合金
激光熔化沉积
微观组织
力学性能
high-entropy alloy
laser melting deposition
microstructure
mechanical property
