Paper Title:
A Study of the Microstructure and Hardness of Ti-5Al-2Sn-2Zr-4Mo-4Cr by Laser Shock Peening
  Abstract

In this paper, the microstructure and hardness of Ti-5Al-2Sn-2Zr-4Mo-4Cr titanium alloy with and without laser shock peening (LSP) were examined and compared. The titanium alloy samples were laser shock peened with different layers at the same power density. The microscopic structure after LSP are tested and analyzed by SEM and TEM. The results indicated that LSP changed the microstructure evidently. After 3 layers laser shock peening, there are nanocrystallization in the LSP zone. The shock wave provided high strain rate deformation and generated high-density dislocations in the material. Multiple severe plastic deformation caused by 3 to 5 LSP layers helped to rearrange the resultant dislocation, to form dislocation networks, leading to the formation of nanocrystallites. On the other hand, the microhardness across the polished surfaces of the titanium materials with and without LSP was measured. It is obvious that the laser shock peening improved the microhardness of the Ti-5Al-2Sn-2Zr-4Mo-4Cr for about 16% at the surface, and the affected depth is about 300 microns from the surface.

  Info
Periodical
Chapter
Material Formulations, Evaluation, and Processing
Edited by
Aimin Yang, Jingguo Qu and Xilong Qu
Pages
471-475
DOI
10.4028/www.scientific.net/AMM.84-85.471
Citation
W. F. He, Y. Q. Li, X. F. Nie, R. J. Liu, Q. P. Li, "A Study of the Microstructure and Hardness of Ti-5Al-2Sn-2Zr-4Mo-4Cr by Laser Shock Peening", Applied Mechanics and Materials, Vols. 84-85, pp. 471-475, 2011
Online since
August 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Keisuke Uenishi, Yasuhito Ogata, Shingo Iwatani, Akira Adachi, Takehiko Sato, Kojiro F. Kobayashi
Abstract:For the improvement of a surface wear resistance of aluminum alloys, iron-based alloys were clad on the surface of an aluminum alloy by...
331
Authors: Bao Yun Qi, Ning He, Liang Li, Wei Zhao
Abstract:It is commonly believed that the white layer formed during hard machining of steels is caused primarily by a thermally induced phase...
241
Authors: Józef Lelątko, Tomasz Goryczka, Tadeusz Wierzchoń, M. Ossowski, Bozena Łosiewicz, Edward Rówiński, Henryk Morawiec
Abstract:Structure of the nitride-oxide surface layers, formed using glow discharge technique at low temperature (between 200 and 380°C) changing the...
127
Authors: Tina Hausöl, Heinz Werner Höppel, Matthias Göken
Abstract:Among the well-known methods of severe plastic deformation the accumulative roll bonding (ARB) process is most promising for producing...
217
Authors: Ai Yong Cui, Fang You Hu, Pei Zhong Zhao, Chang Liang Lu, Bin Hu, Peng Fei Fu
Metal alloy Materials
Abstract:To explore reaction mechanisms and proper effects of aluminium in laser micro-molton pool, experiments of laser cladding (Ti+1-8%Al) on...
1483