An analysis of the Portevin-Le Chatelier effect and cracking of CuSn6P alloy at elevated temperature of deformation applying the acoustic emission method

被引：4
|
作者：
Ozgowicz, Wojciech [1 ]
Grzegorczyk, Barbara [1 ]
Pawelek, Andrzej [2 ]
Wajda, Wojciech [2 ]
Skuza, Wojciech [2 ]
Piatkowski, Andrzej [2 ]
Ranachowski, Zbigniew [3 ]
机构：
[1] Silesian Tech Univ, Inst Engn Mat & Biomat, Konarskiego St 18A, PL-44100 Gliwice, Poland
[2] Polish Acad Sci, Inst Met & Mat Sci, Reymonta St 25, PL-30059 Krakow, Poland
[3] Polish Acad Sci, Inst Fundamental Technol Res, Pawinskiego St 5B, PL-02106 Warsaw, Poland
来源：
ENGINEERING FRACTURE MECHANICS | 2016年 / 167卷
关键词：
Copper alloy; Portevin-Le Chatelier phenomenon; Fractography; Acoustic emission; Intercrystalline fracture; SINGLE-CRYSTALS; BRITTLENESS; DUCTILITY; BRONZES; ALPHA; FLOW;
D O I：
10.1016/j.engfracmech.2016.04.036
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The paper concerns the application of the acoustic emission (AE) method for the determination of the mechanical properties of continuously cast industrial tin bronze CuSn6P, which reveals tendencies to unstable plastic flow connected particularly with the Portevin-Le Chatelier (PLC) effect. The relations between the jerky flow connected with the PLC effect, AE intensity and the evolution of a fracture of the investigated alloy subjected to the tensile and compression tests have been analyzed. It has been found that the intensity of the oscillation of stresses, observed on the curves sigma-epsilon, coincides with the effect of the instability of plastic deformation PLC type and the recorded signals of the intensity of acoustic emissions. It has also been found that the increase of the tensile temperature in the investigated alloy involves changes in the mechanism of cracking from transcrystalline ductile to brittle intercrystalline, characteristic at the temperature of minimum plasticity (DMT). (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：112 / 122
页数：11
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