Paper Title:
Investigation of Laser Shock Processing on the Key Weld Zone of Offshore Platform
  Abstract

Effects of laser power and spot diameter on residual stress and micro-hardness of the welding of ship plate (ASTM A 131) by laser shock processing (LSP) has been investigated. While laser power is 45.9J, spot diameter less thanφ3 mm, the distribution of residual stress in welding line occurs obvious variation, which residual stress compressive increase obviously with spot diameter decrease. When power density is bigger than 1.2×1010 W/cm2, the surface residual stresses and micro-hardness of the welded specimen occur change by LSP. The results show that mechanical properties of the welded joints will be improved by LSP. Laser shock processing produced a residual compressive stress layer on the surface of the target, which is an effective method for protecting the welded steel structures against stress corrosion.

  Info
Periodical
Edited by
Long Chen, Yongkang Zhang, Aixing Feng, Zhenying Xu, Boquan Li and Han Shen
Pages
532-536
DOI
10.4028/www.scientific.net/KEM.464.532
Citation
G. M. Liang, Z. Y. Zhang, Y. M. Chen, Z. M. Xu, "Investigation of Laser Shock Processing on the Key Weld Zone of Offshore Platform", Key Engineering Materials, Vol. 464, pp. 532-536, 2011
Online since
January 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: Kaoru Kawasaki, Katsuya Ujita, Jun Takahashi, Masaaki Sugiyama, Kazuto Kawakami
Abstract:From the point of view of nitriding treatment(570°C), Cu precipitation is also occurred in the steel containing 1.3mass%Cu at this...
852
Authors: Ge Ping Liu, Yu Hua Chen, Hong Yan Wu, Li Ming Ke
Abstract:ZL114A was joined by friction stir welding and liquid nitrogen was used to cool the welded joint during the welding process. The Influence of...
3335
Authors: Jun Wei Zhang, Xiao Dong Hu, Dan Zhang
Abstract:Strip casting process is a kind of promising near net shape technology for producing magnesium alloys strip. The microstructure and...
1012
Authors: Gui Jie Liu, Xin Wang, An Jin Li
Abstract:In offshore jacket platforms, the structural steels are widely used and usually welded connected. This paper presents the welding of 45#...
263
Authors: Yang Yu, Chao Wang, Shu Jun Chen, Zhen Yang Lu
Chapter 5: Monitoring and Control of the Manufacturing Process
Abstract:The joints of RSW for HSHSS were prepared with IF spot weld equipment. The weld nugget, fracture mode, microstructure and micro-hardness of...
375