Intermetallic growth kinetics and microstructure evolution in Al-Cu-Al metal-matrix composite processed by high pressure torsion

被引：30

作者：

Korznikova, G. F. ^{[1
]}

Nazarov, K. S. ^{[1
]}

Khisamov, R. Kh ^{[1
]}

Sergeev, S. N. ^{[1
]}

Shayachmetov, R. U. ^{[1
]}

Khalikova, G. R. ^{[1
]}

Baimova, J. A. ^{[1
]}

Glezer, A. M. ^{[2
]}

Mulyukov, R. R. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Superplastic Problems, 39 Khalturina St, Ufa 450001, Russia

[2] Natl Univ Sci & Technol MISIS, 4 Leninskiy Ave, Moscow 119049, Russia

来源：

MATERIALS LETTERS | 2019年 / 253卷

基金：

俄罗斯科学基金会;

关键词：

Nano-crystalline materials; Phase transformations; In-situ composite; Kinetics; Microstructure; Cu-Al intermetallics; High pressure torsion; DIFFUSION;

D O I：

10.1016/j.matlet.2019.07.124

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Constrained high pressure torsion and subsequent annealing was used to fabricate Al-Cu-Al metal-matrix multilayered composite. The composite has a heterogeneous structure consisting of a plastic aluminum matrix and hard intermetallic inclusions with a gradient decrease of layer thickness from the center to periphery of the sample. Intermetallic growth kinetics was retrieved from precise X-ray phase analysis using a narrow parallel X-ray beam of increased intensity. It was found that the growth of Al2Cu phase at temperatures from 150 degrees C to 210 degrees C can be fitted by t(1/2) time relation, indicating to the bulk diffusion-controlled growth kinetics. The growth activation energy of Al2Cu was calculated to be 0.48 eV. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：412 / 415

页数：4

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