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Sc含量对Al-Mg-Sc-Zr合金铸态组织及时效强化的影响
杨文; 闫德胜; 戎利建
2013-12-15
Source Publication稀有金属材料与工程
Issue12Pages:2530-2535
Abstract用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)及显微硬度仪研究了Sc含量对Al-5.5Mg-0.5Mn-XSc-0.1Zr(质量分数,%)(0.05≤X≤0.50)合金铸态显微组织和时效处理后二次析出相的形貌及其强化作用的影响。结果表明:当Sc含量少于0.09%(质量分数,下同)时,凝固过程中无含Sc相析出,铸锭组织为柱状树枝晶,时效后强化作用有限;当Sc含量在0.16%~0.23%时,凝固过程中析出少量初生及共晶Al3(Sc,Zr)相,这既能够细化晶粒,又不影响时效后二次析出相的热稳定性,时效后合金的硬度也较高;而Sc含量过高(X≥0.23)时,合金中初生和共晶Al3(Sc,Zr)相的含量增多,虽然也能够细化晶粒,但凝固后基体中固溶的Zr含量也会随之降低,导致二次Al3(Sc,Zr)相的热稳定性降低,450℃时效24 h后二次析出相粗化严重,强化作用很弱。
description.department中国科学院金属研究所
KeywordAl-mg-sc-zr合金 晶粒细化 Al3(Sc 沉淀强化 Zr)
Language中文
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72529
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
杨文,闫德胜,戎利建. Sc含量对Al-Mg-Sc-Zr合金铸态组织及时效强化的影响[J]. 稀有金属材料与工程,2013(12):2530-2535.
APA 杨文,闫德胜,&戎利建.(2013).Sc含量对Al-Mg-Sc-Zr合金铸态组织及时效强化的影响.稀有金属材料与工程(12),2530-2535.
MLA 杨文,et al."Sc含量对Al-Mg-Sc-Zr合金铸态组织及时效强化的影响".稀有金属材料与工程 .12(2013):2530-2535.
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