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Testing and fracture mechanics analysis of strength effects on the fatigue behavior of HFMI-treated welds

Welding in the World volume 60, pages 987–999 (2016)Cite this article

A Publisher's Erratum to this article was published on 28 June 2016

Abstract

In this paper, recent fatigue tests conducted on welded specimens subjected to high frequency mechanical impact (HFMI) treatment are described, geometry measurements and metallurgical analyses of the tested specimens are presented, and efforts to estimate the test results using a nonlinear fracture mechanics model are discussed. The specimens were fabricated from 9.5-mm-thick (3/8 in.) aluminum (5083-H321) and high-strength steel (ASTM A514) plate. The specimen geometry and preparation followed procedures used in previous studies on mild steel (CSA 350W). Fatigue tests were performed on the as-welded and impact-treated specimens under two loading histories (constant amplitude with and without periodic under-loads) at several equivalent stress ranges. Residual stress distributions were determined by x-ray diffraction. In addition, weld toe geometry measurements were obtained using silicon impressions and micro-hardness distributions were obtained on polished weld samples for each material type. This information was used to establish parameter values for a nonlinear fracture mechanics analysis. The employed fracture mechanics model is reviewed in this paper, and its benefits as a tool for modelling the fatigue behavior of impact-treated welds are discussed. Following this, the effectiveness of the model in estimating the test results for the three materials is assessed.

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Acknowledgments

The financial support for this research provided by GDLS Canada is gratefully acknowledged. The impact treatment of the 5083 and A514 weld samples provided by Dave Pow and Brett Kilgour at Pow Engineering is also gratefully acknowledged. At the University of Waterloo, Richard Morrison, Rob Sluban, James St. Onge, Shui Guo, and Prof. Tim Topper are thanked for their technical input and assistance related to the laboratory testing aspects of the project.

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada

    Rakesh Ranjan, Kasra Ghahremani & Scott Walbridge

  2. School of Engineering Technology, Purdue University, West Lafayette, IN, USA

    Ayhan Ince

Authors
  1. Rakesh Ranjan
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  2. Kasra Ghahremani
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  3. Scott Walbridge
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  4. Ayhan Ince
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Corresponding author

Correspondence to Scott Walbridge.

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Recommended for publication by Commission XIII - Fatigue of Welded Components and Structures

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Ranjan, R., Ghahremani, K., Walbridge, S. et al. Testing and fracture mechanics analysis of strength effects on the fatigue behavior of HFMI-treated welds. Weld World 60, 987–999 (2016). https://doi.org/10.1007/s40194-016-0354-4

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  • DOI: https://doi.org/10.1007/s40194-016-0354-4

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