A multiple grain size distributed Al-based composite consist of amorphous/nanocrystalline, submicron grain and micron grain fabricated through spark plasma sintering

作者：Tan, Zhen; Wang, Lu; Xue, Yunfei^*; Wang, Guohong; Zhou, Zheng; Tian, Lifen; Wang, Yiming; Wang, Benpeng; He, Dingyong

来源：Journal of Alloys and Compounds, 2018, 737: 308-316.

DOI：10.1016/j.jallcom.2017.12.102

• Multiple grain size distribution
• Spark plasma sintering
• Amorphous/nanocrystalline
• Submicron grain
• Mechanical behavior

A multiple grain size distributed Al-based composite was fabricated through ball milling the amorphous powder mixed with pure Al powder followed by spark plasma sintering. The composite consisted of amorphous/nanocrystalline, submicron grain and micron grain, exhibiting outstanding mechanical properties. The superior strengthen effect of the amorphous/nanocrystalline region contributed to the exhibiting specific strength (5.66 x 10(5) Nm/kg) of the composite. The orderly plastic deformation occurred within FCC-Al micron grain region and submicron grain region during compression. And the progressive deformation restrained the strain localization and unstable propagation of the crack, leading to the plastic deformation (4.3%) of the composite.

• 出版日期2018-3-15
• 单位北京理工大学; 北京工业大学