Effect of grain size on mechanical property of Mg–3Al–1Zn alloy
Effect of grain size on mechanical property of Mg–3Al–1Zn alloy
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DOI：
10.1016/j.scriptamat.2008.02.029
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发表时间：
2008-07
影响因子：
6
通讯作者：
J. Wang;D. Yin;J. Liu;J. Tao;Y. Su;Xiang Zhao
中科院分区：
文献类型：
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作者：
J. Wang;D. Yin;J. Liu;J. Tao;Y. Su;Xiang Zhao
对不同晶粒尺寸的Mg-3Al-1 Zn合金进行等径角挤压、常规挤压和退火后的力学性能测试，结果表明，不同晶粒数的孪晶导致了Mg-3Al-1 Zn合金的压缩/拉伸屈服不对称性。孪晶板角服从正态分布，拉伸时沿载荷轴沿着最大，而压缩时则不。通过两种不同的路线制备的织构样品遵循具有相似斜率的Hall-Petch关系，但在屈服应力方面表现出约50 MPa的差距。
Mechanical tests of Mg–3Al–1Zn alloy with various grain sizes prepared by equal channel angular pressing, conventional extrusion and annealing revealed that compression/tensile yielding asymmetry originates from different number fractions of twinned grains. The twin lamella angle follows a normal distribution, with the maximum along the loading axis in tension but not in compression. Differently textured samples preparation via two different routes follow the Hall–Petch relation with similar slopes but exhibit an ∼50MPa gap in yield stress.