2A14铝合金TTT曲线及其淬火敏感性*

doi:10.11896/j.issn.1005-023X.2017.010.016

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Abstract Quenching sensitivity of 2A14 aluminum alloy was determined by time-temperature-transformation (TTT) curve, which was carried out by an interrupted quench method. XRD,TEM and EDS were applied to investigate the microstructure of 2A14 aluminum alloy, and the isothermal phase transformation kinetics were studied by Avrami equation. The results showed that the nose temperature of TTT curve was 350 ℃ and the quench sensitive temperature range was 300-400 ℃. In addition, the supersaturated solid solution decomposed and precipitated quickly at 350 ℃, due to higher degree of supersaturation and fast diffusion rate. Furthermore, this work suggests that for 2A14 aluminum alloy, residual stress and mechanical properties can be balanced by increasing coo-ling rate within quenching sensitivity range (300-400 ℃) and reducing cooling rate in other temperature ranges.

Key words： 2A14 aluminum alloy TTT curve quench sensitivity

Published: Online: 2018-05-08

CLC number:

TG146.2

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	Articles by authors
	DONG Fei
	YI Youping
	HUANG Shiquan
	ZHANG Yuxun

Cite this article:

DONG Fei,YI Youping,HUANG Shiquan, et al. TTT Curves and Quench Sensitivity of 2A14 Aluminum Alloy[J]. Materials Reports, 2017, 31(10): 77-81.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.010.016 OR https://www.mater-rep.com/EN/Y2017/V31/I10/77

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