1. Precipitates evolution in the heat affected zone of Mg-Gd-Y-Zr alloy in T6 condition during laser welding.
- Author
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Wang, Lyuyuan, Huang, Jian, Peng, Yong, and Wu, Yixiong
- Subjects
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LASER welding , *ALLOYS , *HEAT , *BIOLOGICAL evolution , *ZONING , *HEAT resistant alloys - Abstract
The precipitates evolution in the heat affected zone of laser-welded Mg-Gd-Y-Zr alloy in T6 condition was investigated based on the TEM observation. Some oval and long-rod shape precipitates along [ 2 1 ¯ 1 ¯ 0 ] α were observed, which were not involved in precipitation sequence. Compared with isothermal aged precipitates, the overaged β′ phase presented same morphology and size, while size of needle-shape β became much smaller. The width of complete dissolution zone of the β′ is smaller than that of partial dissolution and transformation zone. • Some oval and long-rod shape precipitates along [ 2 1 ¯ 1 ¯ 0 ] α were observed in the HAZ. • Some overaged β' phase can be precipitated in the HAZ. • The size of needle-shape β in the HAZ became much smaller, compared with isothermal aged precipitates. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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