Formation and mechanism of nanocrystalline AZ91 powders during HDDR processing
作者： Yafen Liu , Jianfeng Fan , Hua Zhang , Qiang Zhang , Jing Gao
DOI: 10.1016/J.MATCHAR.2017.01.028
关键词:
摘要: Grain sizes of AZ91 alloy powders were markedly refined to about 15 nm from 100 to 160 μm by an optimized hydrogenation-disproportionation-desorption-recombination (HDDR) process. The effect of temperature, hydrogen pressure and processing time on phase and microstructure evolution of AZ91 alloy powders during HDDR process was investigated systematically by X-ray diffraction, optical microscopy, scanning electron microscopy and transmission electron microscopy, respectively. The optimal HDDR process for preparing …
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