Crystallization behavior of heat-affected zone by laser remelting bulk metallic glass Zr55Al10Ni5Cu30

Weiwei Liu, Xin Lin, Gaolin Yang, Hai'ou Yang, Weidong Huang, Jinfu Li

科研成果: 期刊稿件文章同行评审

3 引用 (Scopus)

摘要

The microstructure evolution of bulk metallic glass Zr55Al10Ni5Cu30 during pulsed laser remelting is investigated. It is found that the remelted zone always keeps amorphous structure and the crystallization tendency in heat-affected zone (HAZ) increases with the laser energy density increasing or the scanning velocity decreasing. The crystallization in the HAZ can be avoided but the structural relaxation occurres when the scanning velocity is equal to or greater than 15 mm/s. When the crystallization occurres in the HAZ, the micron-scale spherical grain is formed in the pattern of the multi-layer with the inner coupled lamellar structure, and crystalline phases are composed of tetragonal Zr2Cu and face-centered cubic Zr2Ni. Crystallization in the HAZ near the bottom of molten pool is more severe than that in the region near edge of surface. The grain size in the HAZ near bottom of molten pool decreases away from the remelted zone, and the layer numbers of the spherical grain in the HAZ near the remelted zone are more than that near the substrate side.

源语言英语
页(从-至)2104-2110
页数7
期刊Zhongguo Jiguang/Chinese Journal of Lasers
37
8
DOI
出版状态已出版 - 8月 2010

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