摘要
制备了不同ZR含量的MGZN5ND3.5ZRX合金,研究了ZR元素对合金晶粒大小及铸态力学性能的影响。显微组织观察表明,当W(ZR)≤0.8%时,合金晶粒度随ZR含量增加而减小;当W(ZR)>0.8%时,合金晶粒度基本保持不变。力学性能测试表明,ZR元素的添加,使合金铸态下的抗拉强度和伸长率均得到了提高。拉伸断口SEM形貌分析表明,合金断裂方式由准解理断裂向韧性断裂发生转变。
The effects of different Zr contents on the grain size and as-cast mechanical properties of the MgZn5Nd3.5 alloy were studied.Microstructural observation indicates that grain size is increased with increase in the Zr content in case of Zr content less than 0.8%,while the grain size is somewhat changed with that in case of Zr content more than 0.8%.From the mechanical property measurements indicate that Zr addition can improve as-cast tensile strength and elongation of the alloy.SEM analysis shows that alloy rupture changes from quasi-cleavage fracture to ductility fracture.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2006年第2期74-76,共3页
Special Casting & Nonferrous Alloys
关键词
铸造
镁合金
ZR
晶粒细化
Casting,Mg Alloy,Zr,Grain Refinement
