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Surface microstructure characterization on shot peened (TiB + TiC)/Ti–6Al–4V by Rietveld whole pattern fitting method

Published online by Cambridge University Press:  12 July 2016

Lechun Xie ,
Qiang Feng ,
Yan Wen ,
Liqiang Wang ,
Chuanhai Jiang  and
Weijie Lu
Lechun Xie*
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
Qiang Feng
Affiliation:
College of Physics and Engineering, Chengdu Normal University, Chengdu, Sichuan 611130, People's Republic of China
Yan Wen
Affiliation:
School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, People's Republic of China
Liqiang Wang*
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
Chuanhai Jiang
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
Weijie Lu
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
*
a) Address all correspondence to these authors. e-mail: lechunxie@yahoo.com
b) e-mail: wang_liqiang@sjtu.edu.cn
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Abstract

The surface microstructure of shot peened (TiB + TiC)/Ti–6Al–4V is investigated using Rietveld whole pattern fitting method. The domain size and microstrain of them are obtained. By comparing the calculated results between them, it can be found that the microstructure variations of Ti–6Al–4V are more severe than those of (TiB + TiC)/Ti–6Al–4V, which is due to the effect of reinforcements' resistance to the deformation of the surface layer. The distribution of average domain size and microstrain of (TiB + TiC)/Ti–6Al–4V at varying depths are calculated, and the results are discussed in detail. Moreover, the probability distribution of the domain size at different depths is obtained using the lognormal distribution model. Based on the discussion, the results obtained from Rietveld whole pattern fitting method agree with the results calculated using the Voigt method, which reveals that the Rietveld method is an effective method of characterizing the surface microstructure of titanium matrix composites after shot peening treatments.

Keywords

microstructurex-ray diffraction (XRD)Ti
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 15 , 15 August 2016 , pp. 2291 - 2301
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Copyright
Copyright © Materials Research Society 2016 

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