摘要
将不同厚度的AZ31B镁合金挤压坯经多道次和单道次两种轧制工艺制备成厚度约为1 mm的薄板。XRD结果表明,轧板出现了明显(0001)面织构。挤压和轧制过程中的大变形促使了再结晶的发生,进而形成了细小且均匀的显微组织。多道次轧制的最薄轧板中获得了尺寸为5-10μm的等轴晶。细小的再结晶晶粒使材料的强度和塑性得到了改善。多道次轧板的拉伸强度达到了292MPa,其伸长率为单道次轧制的两倍。
AZ31B magnesium alloy sheets with thickness of about 1 mm were prepared by one pass and several passes rolling from the extruded ingots with different thickness. XRD indicate that AZ31B magnesium alloy sheets exhibit a dominant texture along (0001) orientated plane. The large deformation results in the formation of fine and homogeneous microstructure due to the recrystallization during extruding and hot-rolling. The thinnest sheet obtained by several passes rolling shows equiaxed grains with size of 5-l0μrn in diameter. The fine recrystallization structure contributes to the increase of strength and ductility. The sheet rolled for several passes has a tensile strength of 292 MPa and its elongation is twice as larger as that rolled to one pass.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2006年第3期60-63,共4页
Transactions of Materials and Heat Treatment
基金
新世纪优秀人才支持计划(NCET-04-0105)
关键词
镁合金
轧制
再结晶
拉伸强度
Ductility
Hot rolling
Mechanical properties
Microstructure
Recrystallization (metallurgy)
Tensile strength
X ray diffraction analysis
