摘要
通过模铸法制备了Mg-10Gd-6Y-1.6Zn-XMn(X=0.4,0.8,1.2,1.6,2.0,质量分数,%)系列镁合金,研究了挤压比及Mn含量对Mg-10Gd-6Y-1.6Zn-XMn镁合金显微组织及室温力学性能的影响。结果表明:铸态Mg-10Gd-6Y-1.6Zn-XMn合金经热挤压后,合金中的长周期堆垛有序(LPSO)结构由亚稳的18R结构转变为稳定的14H结构。大挤压比能够显著提高合金的室温力学性能,当Mn含量为0.8%时,未时效态合金的抗拉强度达到386 MPa,断后延伸率约为10%。
Various amounts of Mn element（X=0.4, 0.8, 1.2, 1.6, 2.0, wt%） were added to Mg-10Gd-6Y-1.6Zn alloys. We investigated the effect of Mn content and extrusion ratio on the microstructures and mechanical properties of the alloys. The results show that in the hot extruded Mg-10Gd-6Y-1.6Zn-XMn alloys, the long period stacking ordered（LPSO） structure turns from a metastable 18 R structure into a stable 14 H one. Large extrusion ratio can significantly improve mechanical properties of the alloys at room temperature. When 0.8 wt%Mn element is added to the alloy, its tensile strength of no-aged state is 386 MPa, and its elongation is about 10%.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第1期135-142,共8页
Rare Metal Materials and Engineering
基金
中央高校基本科研业务费(CDJZR13130036)
国家自然科学基金(51474043)
关键词
镁合金
挤压比
长周期堆垛有序(LPSO)结构
显微组织
力学性能
magnesium alloy
extrusion ratio
long period stacking ordered（LPSO） structure
microstructure
mechanical properties
