摘要
研究合金元素Bi对AM60镁合金显微组织和力学性能的影响。借助金相显微镜(OM)、扫描电镜(SEM)和X射线衍射(XRD)对添加Bi的AM60镁合金观察与分析。结果表明:Bi的添加细化了合金显微组织,提高合金力学性能;当Bi的质量分数为1.0%,合金的抗拉强度、硬度和伸长率由176.3 MPa,54.5HBS,7.38%提高至200.2 MPa,70.5HBS和9.68%,分别提高13.6%,29.4%,31.2%。进一步提高Bi加入量,合金显微组织变粗大,性能下降。
Effects of Bi on microstructures and mechanical properties of AM60 magnesium alloy were studied. Optical microscopy, scanning electron microscopy and X-ray diffraction were used to analyze the microstructures of the alloys. Results show that Bi addition to AM60 magnesium alloy can not only refine the microstructures of AM60 magnesium alloy but also improve the mechanical properties. The ultimate tensile strength is improved from 176.3 MPa （without addition Bi） to 200.2 MPa （with addition 1.0% Bi）, the hardness is improved from 54.5HBS to 70.5HBS and the elongation is increased from 4.0% to 6.5%. The ultimate tensile strength, hardness and elongation are improved by 13.6%, 29.4% and 31.2%, respectively. However, the excessive Bi addition leads to the decrease of the mechanical properties of AM60 magnesium alloy.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2013年第1期62-64,共3页
Ordnance Material Science and Engineering
基金
江西省教育厅项目(GJJ11094)
江西省钨铜新材料重点实验室开放基金项目(2010-Wt-06)
关键词
BI
镁合金
显微组织
力学特性
Bi
magnesium alloy
microstructure
mechanical property
