Effect of cryorolling on the mechanical properties of AA5083 alloy and the Portevin-Le Chatelier phenomenon

被引：62
作者：
Krishna, K. S. V. B. R. [1 ]
Sekhar, K. Chandra [2 ]
Tejas, R. [1 ]
Krishna, N. Naga [1 ]
Sivaprasad, K. [1 ]
Narayanasamy, R. [2 ]
Venkateswarlu, K. [3 ]
机构：
[1] Natl Inst Technol, Adv Mat Proc Lab, Dept Met & Mat Engn, Tiruchirappalli 620015, Tamil Nadu, India
[2] Natl Inst Technol, Dept Prod Engn, Tiruchirappalli 620015, Tamil Nadu, India
[3] CSIR, Natl Aerosp Lab, Div Mat Sci, Bangalore 560017, Karnataka, India
来源：
MATERIALS & DESIGN | 2015年 / 67卷
关键词：
Cryorolling; Tensile behaviour; Aluminium alloy; Portevin-Le Chatelier effect; Texture; Formability; STACKING-FAULT ENERGY; PLASTIC INSTABILITIES; DEFORMATION-BEHAVIOR; HIGH-STRENGTH; GRAINED CU; MICROSTRUCTURE; STRESS; ZN; TEMPERATURE; BOUNDARIES;
D O I：
10.1016/j.matdes.2014.11.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of cryorolling on the mechanical properties of an AA5083 alloy was investigated. The effect of rolling strain and temperature on the Portevin-Le Chatelier effect experienced by aluminium alloys with magnesium as a major constituent was also studied. Microstructure evolution during room temperature (RT) and cryorolling (LNR) and their effect on the mechanical properties of the AA5083 alloy were studied in detail. The results showed that the hardness values increased as the rolling reduction was increased. Compared to RT rolling, LNR did not have a significant influence. Deformation-induced precipitation particles of Al6Mn during RTR resulted in enhanced mechanical properties compared to LNR conditions. A negligible amount of precipitation was observed due to suppressed adiabatic heating for samples under LNR conditions. The presence of manganese (more than its solid solubility limit) in the test material could have influenced the behaviour of the AA5083 alloy material upon rolling. The Portevin-Le Chatelier effect was clearly observed, and it was noted that with smaller grain size and an increasing dislocation density, the critical strain for the onset of the PLC effect was lowered. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：107 / 117
页数：11
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