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160°大角度等通道转角挤压AZ61组织演化与力学性能
Microstructure Evolution and Mechanical Properties of AZ61 under 160° Equal Channel High Angular Pressing
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- DOI:
- 作者:
- 杨杰 樊建锋 单召辉 杨牧轩
YANG Jie;FAN Jianfeng;SHAN Zhaohui;YANG Muxuan
- 作者单位:
- 新材料界面科学与工程教育部重点实验室太原理工大学 先进镁基材料山西省重点实验室太原理工大学 材料科学与工程学院太原理工大学
Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;Shanxi Key Laboratory of Advanced Magnesium Based Materials, Taiyuan University of Technology, Taiyuan 030024, China;School of Materials Science and Engineering, Taiyuan University of Technology,Taiyuan 030024, China
- 关键词:
- 160°大角度等通道转角挤压 低温累积变形 AZ61合金 细晶 力学性能
160° equal channel high angular pressing AZ61 fine grain low temperature cumulative deformation mechanical properties
- 摘要:
- 在100℃及150℃对商用AZ61挤压板材采用160°大角度等通道转角挤压,分析了等通道转角挤压(ECAP)变形组织演化规律。基于储能理论分析了100℃和150℃时ECAP对AZ61合金力学性能的影响。结果表明,在100℃时,ECAP三道次累积变形量为0.6,以孪晶动态再结晶(TDRX)为主;在150℃累积变形量为0.6时,以连续动态再结晶(CDRX)为主。150℃的ECAP挤压8道次,再经100℃的ECAP挤压三道次,获得了1μm的细晶组织,提高了AZ61合金的综合力学性能,其屈服强度达到350 MPa,抗拉强度达到了432 MPa。The evolution of deformation microstructure was analyzed by equal channel 160° angle extrusion(ECAP) at100 ℃ and 150 ℃ for commercial AZ61 extrusion plate. Based on the energy storage theory analyzed the at 100 ℃ and150 ℃ when the ECAP effects on mechanical properties of AZ61 alloy. The results show that at 100 ℃, ECAP three times accumulated deformation is 0.6, twin dynamic recrystallization(TDRX) is given priority;At 150 ℃ accumulated deformation of 0.6, the continuous dynamic recrystallization(CDRX) is the main priority. 150 ℃ of ECAP extrusion 8 times, then through 100 ℃ of ECAP extrusion three times, the 1 μm fine grain structure is obtained, improve the comprehensive mechanics performance of the AZ61 alloy, the yield strength and tensile strength are 350 MPa and 432 MPa,respectively.