Mechanical spectroscopy of deformed WE43 magnesium alloys

被引:22
|
作者
Lambri, O. A.
Riehemann, W. [1 ]
Lucioni, E. J.
Bolmaro, R. E.
机构
[1] Clausthal Univ Technol, Inst Mat Sci & Technol, D-38678 Clausthal Zellerfeld, Germany
[2] Univ Nacl Rosario, Inst Fis Rosario, Fac Ciencias Exactas Ingn & Agrimensura, CONICET, RA-2000 Rosario, Santa Fe, Argentina
[3] Univ Nacl Rosario, Mat Lab, Esc Ing Elect, FCEIA, RA-2000 Rosario, Argentina
关键词
ageing; magnesium alloys; internal friction; X-ray diffraction; electrical resistivity;
D O I
10.1016/j.msea.2006.04.134
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Ageing commercial WE43 magnesium alloys at 643 K for various times up to 10,000 s promotes the development of P I precipitates, which strengthen the matrix. However, overageing causes P2 precipitates, which soften the matrix, to develop. Room temperature plastic deformation of samples aged at 643 K causes (a) the generation of new dislocations and (b) the dissolution of the previously developed strengthening PI precipitates. These effects are revealed by (a) the decreased micro yield stress, (b) the increased part of the measured internal friction which is independent of the amplitude, and (c) the decreased integrated intensity of the diffraction peak related to P1. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:476 / 479
页数:4
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