Fracture Failure Performance of 35VB Steel High-Strength Bolts Used in Subtropical Humid Climate
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 12
Abstract
In this study, 35VB high-strength bolts used in subtropical, humid climate were tested to determine the causes of fracture failure. Simulated working conditions of a stress corrosion experiment were carried out on bolt #S1. The fracture macromorphology, micromorphology, and phase composition of corrosion products of failed bolt #D1 and simulated stress corrosion bolt #S1, the metallographic structure of the new bolts #N1, #D1, and #S1, and the mechanical properties of #N1 and #S1 were compared and analyzed. It was concluded that the microstructure of #D1 was defective and there were cracks in the crack source region and the crack propagation region. Stress loading and environmental corrosion led to the occurrence of fracture synergistically. It was speculated that the coupling of the environment with stress produced little damage to the bolt in the stress corrosion test, but the environment and stress accelerated the impact on fracture failure.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors are grateful for the support from Chongqing Key Laboratory of Energy and Environment Engineering and Chongqing Cheng Tou Road and Bridge Administration Co. Ltd.
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 12 • December 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Sep 29, 2020
Accepted: Apr 7, 2021
Published online: Sep 29, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 28, 2022
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