Microstructure, tensile properties and free bulge formability of Sr-and Y-containing AZ31 alloy sheet produced by twin-roll casting and sequential hot rolling

• 作者: Luo-Bin Li Nai-Ming Miao Peng Jiang Wang-Ping Wu Yan-Dong Yu Yi Zhang Zhi-Zhi Wang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1202-1209
• 页数: 8页
• 语种: 英文

摘要

The effects of Sr and Y on microstructure,tensile property and free bulge formability of AZ31 alloy sheet produced by twin-roll casting and sequential hot rolling were investigated to improve the mechanical properties and formability of the AZ31 alloy.Sr and Y addition can form Ai4Sr,Al2Y and Al3Y phases which can impede dislocation movement and promote dynamic recrystallization during the rolling deformation and decrease the lattice resistance to dislocation motion by decreasing Al solubility in the alloy,resulting in finer grains,lower dislocation density and no twinning generating in the twin-roll casting and sequential hot rolling (TRC-HR) AZ31-1.3Sr-1.0Y alloy.The maximum stress and elongation of the alloy increase significantly after adding Sr and Y.The average cavity and grain sizes of the TRC-HR AZ31-1.3Sr-1.0Y alloy are smaller,resulting in higher elongation in the alloy.The addition of Y and Sr can effectively improve the free bulge formability and the thickness uniform of the alloy.The Al4Sr,Al2Y and Al3Y phases can inhibit the grain growth by obstructing dislocation motion or grain boundary slip,resulting in smaller grain size of AZ31-1.3Sr-1.0Y alloy bulge parts.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Peng Jiang		1	0	0.0	0.0
2	Luo-Bin Li		1	0	0.0	0.0
3	Yan-Dong Yu		1	0	0.0	0.0
4	Wang-Ping Wu		1	0	0.0	0.0
5	Zhi-Zhi Wang		1	0	0.0	0.0
6	Yi Zhang		1	0	0.0	0.0
7	Nai-Ming Miao		1	0	0.0	0.0