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Title: Fatigue Performance of Advanced High-Strength Steels (AHSS) GMAW Joints

Abstract

The fatigue performance of gas metal arc welding (GMAW) joints of advanced high strength steels (AHSS) are compared and analyzed. The steel studied included a number of different grades of AHSS and baseline mild steels: DP600, DP780, DP980, M130, M220, solution annealed boron steel, fully hardened boron steels, HSLA690 and DR210 (a mild steel). Fatigue testing was conducted under a number of nominal stress ranges to obtain the S/N curves of the weld joints. A two-phase analytical model is developed to predict the fatigue performance of AHSS welds. It was found that there are appreciable differences in the fatigue S/N curves among different AHSS joints made using the same welding practices, suggesting that the local microstructure in the weld toe and root region plays non-negligible role in the fatigue performance of AHSS welds. Changes in weld parameters can influence the joint characteristics which in turn influence fatigue life of the weld joints, particularly of those of higher strength AHSS. The analytical model is capable of reasonably predicting the fatigue performance of welds made with various steel grades in this study.

Authors:
 [1];  [2];  [2];  [3];  [4]
  1. ORNL
  2. AET Integration, Inc
  3. Ford Motor Company
  4. MIttal Steel
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
965854
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: SAE 2009 World Congress, Detroit, MI, USA, 20090420, 20090423
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BORON; GAS METAL-ARC WELDING; MICROSTRUCTURE; PERFORMANCE; STEELS; TESTING; WELDING

Citation Formats

Feng, Zhili, Sang, Yan, Jiang, Cindy, Chiang, Dr. John, and Kuo, Dr. Min. Fatigue Performance of Advanced High-Strength Steels (AHSS) GMAW Joints. United States: N. p., 2009. Web. doi:10.4271/2009-01-0256.
Feng, Zhili, Sang, Yan, Jiang, Cindy, Chiang, Dr. John, & Kuo, Dr. Min. Fatigue Performance of Advanced High-Strength Steels (AHSS) GMAW Joints. United States. doi:10.4271/2009-01-0256.
Feng, Zhili, Sang, Yan, Jiang, Cindy, Chiang, Dr. John, and Kuo, Dr. Min. Thu . "Fatigue Performance of Advanced High-Strength Steels (AHSS) GMAW Joints". United States. doi:10.4271/2009-01-0256.
@article{osti_965854,
title = {Fatigue Performance of Advanced High-Strength Steels (AHSS) GMAW Joints},
author = {Feng, Zhili and Sang, Yan and Jiang, Cindy and Chiang, Dr. John and Kuo, Dr. Min},
abstractNote = {The fatigue performance of gas metal arc welding (GMAW) joints of advanced high strength steels (AHSS) are compared and analyzed. The steel studied included a number of different grades of AHSS and baseline mild steels: DP600, DP780, DP980, M130, M220, solution annealed boron steel, fully hardened boron steels, HSLA690 and DR210 (a mild steel). Fatigue testing was conducted under a number of nominal stress ranges to obtain the S/N curves of the weld joints. A two-phase analytical model is developed to predict the fatigue performance of AHSS welds. It was found that there are appreciable differences in the fatigue S/N curves among different AHSS joints made using the same welding practices, suggesting that the local microstructure in the weld toe and root region plays non-negligible role in the fatigue performance of AHSS welds. Changes in weld parameters can influence the joint characteristics which in turn influence fatigue life of the weld joints, particularly of those of higher strength AHSS. The analytical model is capable of reasonably predicting the fatigue performance of welds made with various steel grades in this study.},
doi = {10.4271/2009-01-0256},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {1}
}

Conference:
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