期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 487, 期 1-2, 页码 109-115出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.07.148
关键词
Al-Mg-Li alloy; Thermomechanical processing; Grain refining; Recrystallization; Superplasticity
资金
- International Science and Technology Cooperation Program of China [2008DFR50260]
- Major State Basic Research Development Program of China [2005CB623706]
A novel thermomechanical processing has been developed for producing fine-grained Al-Mg-Li alloy 1420 sheet for superplasticity. The refined microstructure had layers of different grain structure through the normal direction of the sheet. The surface layer (SL) had fine, nearly equiaxed grains whereas the center layer (CL) had coarse, elongated grains. The superplastic properties and microstructural evolution of alloy 1420 with such microstructure were investigated using uniaxial tensile tests. It was shown that the refined alloy exhibited considerable elongations of 580-915% when deformed at 510-540 degrees C and initial strain rates from 5 x 10(-4) to 1 x 10(-3) s(-1). Microstructure observation revealed that the alloy 1420 exhibited unusual cavitation behavior and extensive CBS occurred when tested at 510 degrees C and above, however, the occurrence of CBS was not uniform. The effects of temperature and strain on grain size and shape, cavity size and volume fraction in the SL and CL were determined, respectively. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据