摘要
研究了Ce元素对ZK40合金的显微组织和室温拉伸性能的影响。在铸态下,1#合金(不含Ce)比2#合金(含Ce)具有高的强度和延性。经过热挤压塑性变形后,2#合金的σb及σ0.2有较大幅度的升高,分别比1#合金增加了49MPa和92MPa,而2#合金延性较低。热塑性变形使1#合金和2#合金的显微组织都得到细化。变形态1#合金的室温拉伸断口由准解理+韧性断裂的混合断口组成,2#合金拉伸断口韧窝分布均匀,为明显的沿晶断裂。
The effects of Ce on microstructures and tensile properties at room temperature for ZK40 alloy were studied. The alloy 1~# without Ce exhibited the higher strength and ductility as cast than alloy 2~# with Ce. However, the alloy 2~# showed the greater increment of strength, as 49 MPa for σ_b, and 92 MPa for δ_(0.2), whereas the ductility still took the station of lower extent than alloy 1~# after extruded. The thermo-mechanical process refined the alloy 1~# and 2~#. The fracture surface of the alloy 1~# showed the mixture of quasi-cleavage and ductile morphology, while the alloy 2~# showed the intergranular fracture surface.
出处
《热加工工艺》
CSCD
北大核心
2004年第4期4-6,11,共4页
Hot Working Technology
基金
中国博士后科学基金资助项目(2003033090)
