Transactions of Materials and Heat Treatment

Title：Effect of channel clearances on microstructures and mechanical properties of AZ31 magnesium alloy sheet processed by equal channel angular rolling

Authors： ZHOU Tao CHEN Zhen-hua CHENG Yong-qi(College of Materials Science and Engineering Hu'nan University Changsha Hu'nan 410082 China)

Unit：

KeyWords： equal channel angular rolling AZ31magnesim alloy channel clearance crystal orientation mechanical properties

ClassificationCode：TG339

year,vol(issue):pagenumber：2007,32(1):32-35

Abstract：

The evolvement characteristic of crystal orientation of AZ31 magnesium alloy sheet at different channel clearances and effects of channel clearances on its microstructures and mechanical properties during equal channel angular rolling(ECAR) are investigated.By XRD patterns,it is found that the change of crystal orientation increases and(0002) basal plane orientation decreases with channel clearance decreasing during ECAR.After ECAR,twins increase obviously and increase gradually with channel clearance decreasing.By tensile test,it is known that distortion behavior and mechanical properties of the sheet processed by ECAR have obvious anisotropy,and compared with as-received sheet,in rolling direction its yield strength decreases from 240MPa to 155MPa and ultimate tensile strength increases slightly,while the elongation to failure is increased slightly with channel clearance decreasing;but in horizontal direction both its yield strength and ultimate tensile strength increase,and with channel clearance decreasing they decrease slightly but elongation to failure is also increased.

Funds：

国家自然科学基金资助项目(50674043)

Reference：

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