Paper Title:
Elucidation of Welding Stability Based on Keyhole Configuration during High-Power Fiber Laser Welding
  Abstract

During deep penetration laser welding, a keyhole is formed in the molten pool due to the intense recoil pressure of evaporation. The formation of the keyhole leads to a deep penetration weld with a high aspect ratio and this is the most advantageous feature of welding by high-energy-density beams. The configuration and characteristics of a keyhole are related to the welding stability. In a fiber laser butt-joint welding of Type 304 austenitic stainless steel plate with a high power 10 kW continuous wave fiber laser, an infrared sensitive high-speed video camera was used to capture the dynamic images of the molten pools. The configurations of a keyhole were analyzed through image processing techniques such as median filtering, wiener filtering and gray level threshold segmentation to obtain the edge of a keyhole. The width and the area of a keyhole were defined as the keyhole characteristic parameters, and the deviation between the laser beam and weld center as a parameter reflecting the welding stability. By analyzing the change of the keyhole characteristic parameters during welding process, it was found that these parameters were related to the welding stability. Welding experimental results and analysis of the keyhole characteristic parameters confirmed that the welding stability could be monitored and distinguished by a keyhole configuration during high-power fiber laser welding.

  Info
Periodical
Advanced Materials Research (Volumes 314-316)
Chapter
Mechanical Behavior & Fracture
Edited by
Jian Gao
Pages
941-944
DOI
10.4028/www.scientific.net/AMR.314-316.941
Citation
X. D. Gao, Q. Wen, S. Katayama, "Elucidation of Welding Stability Based on Keyhole Configuration during High-Power Fiber Laser Welding", Advanced Materials Research, Vols. 314-316, pp. 941-944, 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: Xiang Dong Gao, Ling Mo, Seiji Katayama
Mechanical Behavior & Fracture
Abstract:Seam tracking is an important field to obtain good welding quality. During the high-power fiber laser welding, the laser beam focus must be...
932
Authors: Ling Mo, Xiang Dong Gao, Qian Wen, De Yong You
Chapter 3: Materials Forming, Machining and Joining
Abstract:Seam tracking is significant to obtain good welding quality. Aiming at establishing a model to detect and calculate the seam tracking offset...
1464
Authors: Ren He Zhen, Xiang Dong Gao
Chapter 3: Mechanical Engineering and Applied Mechanics
Abstract:It is well known that weld pool geometry plays a critical role in laser welding. In this study, an IPG YLR-10000 device was used to capture a...
344
Authors: Yong Hua Liu, Xiang Dong Gao
Chapter 1: Engineering Design. Theory and Practice
Abstract:During deep penetration laser welding, a keyhole is formed in the molten pool. The characteristics of keyhole are related to the welding...
352
Authors: Jian Bin Liang, Xiang Dong Gao, De Yong You, Zhen Shi Li, Wei Ping Ruan
Chapter 5: Other Related Topics
Abstract:Laser welding includes the heat conduction welding and the deep penetration welding. Deep penetration welding can not only penetrate the...
1064