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Research Papers

Characterization on Surface Properties of Ti–6Al–4V After Multiple Shot Peening Treatments

[+] Author and Article Information
Lechun Xie

State Key Laboratory of
Metal Matrix Composites,
School of Materials Science and Engineering,
Shanghai Jiao Tong University,
No. 800 Dongchuan Road,
Shanghai 200240, China
e-mail: lechunxie@yahoo.com

Yan Wen

School of Physics and
Optoelectronic Engineering,
Nanjing University of Information
Science and Technology,
Nanjing, Jiangsu 210044, China

Liqiang Wang

State Key Laboratory of
Metal Matrix Composites,
School of Materials Science and Engineering,
Shanghai Jiao Tong University,
No. 800 Dongchuan Road,
Shanghai 200240, China
e-mail: wang_liqiang@sjtu.edu.cn

Chuanhai Jiang

State Key Laboratory of
Metal Matrix Composites,
School of Materials Science and Engineering,
Shanghai Jiao Tong University,
No. 800 Dongchuan Road,
Shanghai 200240, China

Vincent Ji

LEMHE/ICMMO,
UMR 8182,
Université Paris-Sud 11,
Orsay 91405, France

1Corresponding authors.

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received December 23, 2015; final manuscript received April 20, 2016; published online June 13, 2016. Assoc. Editor: Vikas Tomar.

J. Eng. Mater. Technol 138(4), 041005 (Jun 13, 2016) (6 pages) Paper No: MATS-15-1331; doi: 10.1115/1.4033577 History: Received December 23, 2015; Revised April 20, 2016

As an important surface treatment method, shot peening (SP) can improve the surface properties effectively. In this work, after multiple SP treatments, the uniformity of the residual stress distribution and the domain size distribution on the surface of Ti–6Al–4 V have been investigated via an X-ray diffraction method. Compared with traditional SP treatments, the multiple SP can increase the surface residual stresses and make the stress distribution more uniform. In terms of the domain size, the multiple SP treatments mainly influence its uniform distribution, and there is no obvious effect to the values, which is due to the saturation status of SP process. In addition, the effects of multiple SP on the surface roughness and hardness have been studied. The results show that the multiple SP can reduce the surface roughness and increase the hardness in a certain extent comparing with the effect of traditional SP, which are ascribed to the smaller shot balls and the more homogeneous deformation during the process of multiple SP. Therefore, an appropriate multiple SP can improve the surface properties of Ti–6Al–4 V effectively.

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Figures

Grahic Jump Location
Fig. 1

Residual stress distribution on the surface of Ti–6Al–4 V after SP treatments. (a) The traditional SP, (b) the dual SP, and (c) the triple SP. SP intensities: (a) 0.50 mmA, (b) 0.50 + 0.25 mmA, and (c) 0.50 + 0.25 + 0.15 mmA.

Grahic Jump Location
Fig. 2

XRD patterns before and after SP treatments. SP intensities: (a) 0.50 mmA, (b) 0.50 + 0.25 mmA, and (c) 0.50 + 0.25 + 0.15 mmA.

Grahic Jump Location
Fig. 3

Distribution of domain sizes after SP treatments. (a) The traditional SP, (b) the dual SP, and (c) the triple SP. SP intensities: (a) 0.50 mmA, (b) 0.50 + 0.25 mmA, and (c) 0.50 + 0.25 + 0.15 mmA.

Grahic Jump Location
Fig. 4

Variation of surface roughness Ra before and after SP treatments

Grahic Jump Location
Fig. 5

Variation of hardness at different depths from the surface before and after SP treatments

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