AL7N01 Butt Joint Welding Residual Stress Measurement by Ultrasonic Method

Abstract:

Analysis the shortage of ultrasonic stress measurement based on Lcr wave in low spatial resolution. Point out it is inapplicable in measuring gradient stress field like welding residual stress field. In this paper, propagation differential method is proposed to solve the low spatial resolution problem on Lcr wave stress measurement, and its theory is introduced. This method can raise the spatial resolution from tens of millimeter to a several millimeter level with out decline the stress resolution. A welding residual stress field of 7N01 aluminum alloy butted joint plate is measured by this method, and its result is compared with hole drilling method. Source of errors is discussed. It is seen that propagation differential method is applicable in welding residual stress measurement.

• Periodical: Advanced Materials Research (Volumes 468-471)
• Pages: 476-479
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.468-471.476
• Online since: February 2012
• Authors: Zi Qi Ma, Xue Song Liu, Yi Cheng, Liang Zhang, Jian Gang Shi, Hong Yuan Fang, Shi Long Wang
• Keywords: Lcr Wave, Propagation Path Differential, Spatial Resolution, Welding Residual Stress

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