摘要
采用搅拌摩擦加工(FSP)技术对镁锂合金材料Mg-9Li-Zn进行改质处理。研究了该合金加工改质区的微观组织、硬度、拉伸强度及断裂形貌。结果表明:Mg-9Li-Zn镁锂合金材料经搅拌摩擦处理后,搅拌区由于热和机械作用导致挤压的纹理逐渐消失并且有较多针状α相产生,晶粒组织得到细化,该合金的硬度与抗拉强度提升。但由于搅拌区组织分布不均匀,会使材料的伸长率下降,垂直搅拌摩擦方向的拉伸断口形貌由中心偏延性破坏的区域和边缘偏脆性的区域共同组成,平行搅拌区的拉伸面表现为均匀的延性断裂。
The modification process of Mg-9Li-Zn alloy material by friction stir processing(FSP) technology was carried out. The microstructure, hardness, tensile strength and fracture morphology of processing improvement zone of the alloy were studied. The results show that because of the thermal and mechanical effects, the texture of magnesium lithium alloy gradually disappears after the friction stir treatment, and there are more and more acicular α phase appearing. The grain size is refined,the hardness and tensile strength of the alloy improve, however, due to the uneven distribution of the mixing zone, the elongation of the material decreases, the tensile fracture morphology in the vertical direction of friction stir is composed of the region of the central ductile failure and the region of the edge of the brittle zone, the tensile surface of parallel mixing zone is characterized by uniform ductile fracture.
作者
孙英杉
王金鹏
SUN Yingshan;WANG Jinpeng(School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Laiwu Gas Thermal Company,Laiwu 271100,China)
出处
《热加工工艺》
北大核心
2022年第10期30-33,共4页
Hot Working Technology
基金
国家创新创业训练计划基金项目(201910497117)。
