7050高强铝合金淬火敏感性及组织特征（英文）

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 22; no. 2; pp. 268 - 274
Main Author 李培跃 熊柏青 张永安 李志辉 朱宝宏 王锋 刘红伟
Format Journal Article
LanguageEnglish
Published 2012
Subjects
Jominy末端淬火
冷却速率
淬火敏感性
淬火诱导析出相
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ISSN1003-6326

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Bibliography:LI Pei-yue1,2, XIONG Bai-qing2, ZHANG Yong-an2, LI Zhi-hui2, ZHU Bao-hong2, WANG Feng2, LIU Hong-wei2 1. Luoyang Ship Material Research Institute, Luoyang 471003, China; 2. State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China
43-1239/TG
Jominy end quench test; quench sensitivity; cooling rate; quench induced precipitates
The effect of quenching rate on the electrical conductivity and microstructure of thick plates of incumbent AA7050 was investigated by employing Jominy end quench test. The electrical conductivity measurement and microstructural observation were conducted at different distances from the quenched end. The results indicate that the average cooling rates decrease with increasing the distance from the quenched end of the bar in the quench sensitive temperature range. However, the electrical conductivity increases with the increase of distance from the quenched end. The surface parts of the plate were fully recrystallized, while partial recrystallization took place at the quarter and center parts of the plate. The quench induced grain boundary precipitates became remarkably coarser and discontinuously distributed with increasing distance from the quenched end of the bar. Plenty of heterogeneous precipitates were observed to nucleate on A13Zr dispersoids when the distance from the quenched end was greater than 38mm.
ISSN:1003-6326