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RETRACTED-Effect of electropulsing treatment on the microstructure, texture, and mechanical properties of cold-rolled Ti–6Al–4V alloy

Published online by Cambridge University Press:  24 July 2014

Xiaoxin Ye
Affiliation:
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; and Key Laboratory for Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China
Guoyi Tang*
Affiliation:
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; and Key Laboratory for Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China
Guolin Song
Affiliation:
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China
Jie Kuang
Affiliation:
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China
*
a)Address all correspondence to this author. e-mail: tanggy@mail.sz.tsinghua.edu.cn
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Abstract

Electropulsing treatment (EPT) provided a promising technology to improve the microstructure and plasticity of the cold-rolled Ti–6Al–4V noticeably while only affecting the strength mildly. Thus, titanium alloy of high plasticity and good comprehensive property can be obtained by this high efficient processing method. The research found that the tensile ductility could be improved largely with the increasing frequency. In the low frequency, the maximum ductility (32.5%) could be obtained at 293 Hz-EPT. Under high-frequency EPT, plasticity has a slight decrease but the tensile strength increases in the contrary. With the help of multi-characterization, abstracting phenomena are explained and therefore the conclusion has been drawn that the whole process of increasing frequency EPT can be divided roughly into two periods: (a) recrystallization period in the low frequency, at this period athermal effect of the EPT played a leading role and (b) phase change period in the high frequency, at this period the other important factor of the EPT thermal effect was predominant. As a comparison, furnace heat treatment is conducted to prove the preferential phase transition instead of complete recrystallization under the single heating effect. The mechanism of the results can be discussed by the competitive mechanism of recrystallization process and phase change in the EPT processing.

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Copyright
Copyright © Materials Research Society 2014 

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