摘要
采用定向凝固方法制备了Cr/Mo微合金化高Nb Ti-Al合金,并考察了其微观结构和力学性能。结果表明,两种合金都呈现出层片状微观组织。尽管温度梯度受限,抽拉速度较高,但与Ti-16Al-12Nb相比,Ti-16Al-12Nb-3Cr-1Mo合金中的片层倾向于与抽拉方向呈更小角度生长,在室温和650℃时的拉伸强度和塑性均呈显著增加。
Cr-and Mo-doped high-Nb containing Ti-Al alloys were fabricated using directional solidification process.Their microstructures and mechanical properties were examined.Results showed that both the two alloys displayed basket-weave type microstructures.The laths in Ti-16Al-12Nb-3Cr-1Mo tended to be inclined with a smaller angle to the withdrawal direction than Ti-16Al-12Nb alloy although the limited thermal gradient and comparatively high withdrawal velocity were employed.Remarkable enhancement in strength and ductility was achieved at room temperature and 650℃.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2011年第3期82-86,共5页
Journal of Materials Engineering
基金
国家自然基金(10672153)
教育部“新世纪优秀人才支持计划”(NCET-07-0790)
