Concurrent formation of two different type precipitation-free zones during the initial stage of homogenization

被引：23

作者：

Chen, Y. Q. ^{[1
]}

Yi, D. Q. ^{[1
]}

Jiang, Y. ^{[1
]}

Wang, B. ^{[1
]}

Liu, H. Q. ^{[1
]}

机构：

[1] Cent S Univ, Sch Mat, Changsha 410083, Hunan, Peoples R China

来源：

PHILOSOPHICAL MAGAZINE | 2013年 / 93卷 / 18期

基金：

中国国家自然科学基金;

关键词：

precipitation-free zone; formation mechanism; EDX; transmission electron microscopy; aluminium alloys; CU-MG ALLOY; AL-MG; GRAIN-BOUNDARIES; SURFACE PITS; VACANCIES; NUCLEATION; CONDENSATION; ALUMINUM;

D O I：

10.1080/14786435.2013.766371

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy were used to study the microstructure evolution of Al-Cu-Mg alloy during the initial stage of homogenization. It was found that two types of precipitation-free zones (PFZs) can form concurrently: one near grain boundaries and the other at the grain centres. Depth profile analyses of solute concentrations and dislocation-loop distributions strongly suggested that the formations of the two type of PFZs are different, due solely and exclusively to solute and vacancy depletion, respectively. A mechanism model was proposed to explain the concurrent formation of the two different type of PFZs during the initial stage of homogenization.

引用

页码：2269 / 2278

页数：10

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