Effects of hot compression deformation temperature on the microstructure and properties of Al-Zr-La alloys

Xian-hua Yue; Chun-fang Liu; Hui-hua Liu; Su-fen Xiao; Zheng-hua Tang; Tian Tang

doi:10.1007/s12613-018-1566-y

Volume 25 Issue 2

Feb. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(2): 236-243

Xian-hua Yue, Chun-fang Liu, Hui-hua Liu, Su-fen Xiao, Zheng-hua Tang, and Tian Tang, Effects of hot compression deformation temperature on the microstructure and properties of Al-Zr-La alloys, Int. J. Miner. Metall. Mater., 25(2018), No. 2, pp. 236-243. https://doi.org/10.1007/s12613-018-1566-y

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Xian-hua Yue, Chun-fang Liu, Hui-hua Liu, Su-fen Xiao, Zheng-hua Tang, and Tian Tang, Effects of hot compression deformation temperature on the microstructure and properties of Al-Zr-La alloys, Int. J. Miner. Metall. Mater., 25(2018), No. 2, pp. 236-243. https://doi.org/10.1007/s12613-018-1566-y

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Research Article

Effects of hot compression deformation temperature on the microstructure and properties of Al-Zr-La alloys

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Corresponding author:
Zheng-hua Tang E-mail: sacdtzh@163.com
Received: 3 June 2017; Revised: 30 October 2017; Accepted: 3 November 2017

Abstract

Abstract

The main goal of this study is to investigate the microstructure and electrical properties of Al-Zr-La alloys under different hot compression deformation temperatures. In particular, a Gleeble 3500 thermal simulator was used to carry out multi-pass hot compression tests. For five-pass hot compression deformation, the last-pass deformation temperatures were 240, 260, 300, 340, 380, and 420℃, respectively, where the first-pass deformation temperature was 460℃. The experimental results indicated that increasing the hot compression deformation temperature with each pass resulted in improved electrical conductivity of the alloy. Consequently, the flow stress was reduced after deformation of the samples subjected to the same number of passes. In addition, the dislocation density gradually decreased and the grain size increased after hot compression deformation. Furthermore, the dynamic recrystallization behavior was effectively suppressed during the hot compression process because spherical Al₃Zr precipitates pinned the dislocation movement effectively and prevented grain boundary sliding.
- microstructure;
- Al-Zr-La alloys;
- hot compression;
- deformation;
- dislocation

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