摘要
利用X射线衍射仪、光学显微镜、扫描电镜、透射电镜等研究了不同热处理温度对Zr56Co44合金显微组织和力学性能的影响。结果表明:对于Zr56Co44合金的铸态试样和热处理试样,其相结构均由B2相和第二相Zr2Co相所组成;随着热处理温度增加,Zr2Co相含量减少,且在723 K和773 K下热处理试样的Zr2Co相体积分数相差较小。在723 K下热处理试样不仅具有最大抗压强度(1185 MPa),最大塑性应变(9.3%),最大维氏硬度(392 HV)还具有最大静载压缩韧度(110.2×106 J·m-3)。另外,在723 K下进行热处理试样的断裂机制主要为延性断裂为主准解理断裂为辅的断裂机制。
The microstructure and mechanical properties of Zr56Co44 alloy after heat treatment at different temperatures were studied by means of X-ray diffraction, optical microscope, scanning electron microscopy and transmission electron microscopy. The results show that the phase structure of as-cast and heat-treated Zr56Co44 alloy is composed of B2 phase and second phase Zr2Co. With the increase of heat treatment temperature, the content of Zr2Co phase decreases, and the difference of volume fraction of Zr2Co phase at 723 K and 773 K is small. The alloy heat-treated at 723 K has the maximum compressive strength(1185 MPa), maximum plastic strain(9.3%), the maximum Vickers hardness(392 HV) and the maximum static compressive toughness(110.2×106 J·m-3). In addition, the fracture mechanism of the heat-treated alloy at 723 K is ductile fracture as the principal part and quasi-cleavage fracture as the auxiliary part.
作者
李培友
LI Pei-you(School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723001 ,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第7期53-59,共7页
Transactions of Materials and Heat Treatment
基金
陕西理工大学博士科研启动基金(SLGKYQD2-22)
