摘要
采用光学显微镜、X射线衍射仪、扫描电镜及能谱仪等手段研究了1.0%(质量分数)的Sm变质对ADC12铝合金组织结构的影响。结果表明,加入1.0%的Sm能使合金中α-Al相和共晶硅相均得到明显细化,α-Al相二次枝晶间距由51μm减小到15μm,平均晶胞尺寸由90μm减小到40μm;共晶硅由粗大的针状变为尺寸较小的短棒状或圆球状,圆整度得到提高;变质后的合金中生成了高熔点Al11Sm3金属间化合物。
The effects of addition of Sm （1.0wtG） on microstructure of as-cast ADC12 Al-alloy were investi- gated by using optical microscope, X-ray diffraction, scanning electron microscope, and energy disperse spectroscopy. The results show that the addition of Sm could significantly refine the a（A1） and eutectic silicon, the secondary den- drite arm spacing decreased from 51 μm to 15 μm and the size of primary a（A1） cell decreased from 90 μm to 40/μm, the morphology of eutectic silicon evolved from acicular morphology to small short rod or globe and the high inching point phase A11l Sm3 was found in the alloy after modification.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2013年第4期45-48,共4页
Materials Reports
基金
国家自然科学基金(51165032)
江西省教育厅资助项目(GJJ11269)
江西省高等学校科技创新团队资助项目(00008713)
江西省铜钨新材料重点实验室开放基金(2011-TW-03)
关键词
SM
ADC12铝合金
细化
变质
显微组织
Sm, ADC12 aluminum alloy, refinement, modification, microstructure
