Effect of aging treatment on fatigue behaviour in extruded AZ61 and AZ80 magnesium alloys

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:517

Article

Uematsu, Y.¹  Tokaji, K.¹  Matsumoto, M.² 

[1] Gifu Univ, Dept Mech & Syst Engn, Gifu 5011193, Japan

[2] Hayashi Telempu Co Ltd, Naka Ku, Nagoya, Aichi 4600013, Japan

关键词: Fatigue strength;    Magnesium alloy;    Aging treatment;    Microstructure;    Crack initiation;   

DOI  :  10.1016/j.msea.2009.03.066

来源: Elsevier

【 摘 要 】

The effect of aging treatment on fatigue behaviour in extruded Mg alloys AZ61 and AZ80 was studied. Rotary bending fatigue tests were performed using as-received and aged specimens. Two different aging conditions, T6 and T5, were evaluated. Mg(17)Al(12) precipitated near grain boundaries and within grains by aging treatments. In both materials, the T6-treated specimens showed significantly lower fatigue strength than the as-received specimens, which was more remarkable in AZ80, while the T5-treated specimens exhibited slightly higher fatigue strength in AZ80. It was indicated that the effect of aging treatment on fatigue strength was mainly attributed to the change in fatigue crack initiation mechanism. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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