Estimation of the efficiency of methods aimed at increasing the fatigue resistance of welded joints under impact loading at low temperatures

We analyze the experimental data on the influence of various types of hardening treatment (mechanical removal of reinforcement of the weld, argon-arc treatment, blasting, and ultrasonic surface cold working) on the fatigue resistance of welded joints of low-alloy steels under harmonic and impact loa...

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Bibliographic Details
Published in:Strength of materials 2001-05, Vol.32 (6), p.571-571
Main Authors: Degtyarev, V A, Shul'ginov, B S
Format: Article
Language:English
Online Access:Get full text
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Summary:We analyze the experimental data on the influence of various types of hardening treatment (mechanical removal of reinforcement of the weld, argon-arc treatment, blasting, and ultrasonic surface cold working) on the fatigue resistance of welded joints of low-alloy steels under harmonic and impact loads at room and low (-60 deg C) temperatures. It is shown that the level of fatigue resistance increases after each type of treatment carried out under the same testing conditions. The comparison of the efficiency of the indicated types of treatment under impact loading at low temperature with the original state of the welded joint under harmonic loading at room temperature demonstrates that ultrasonic surface cold working is the most efficient procedure of hardening of welded structures operating at low climatic temperatures. Materials studied: manual arc welded 14Kh2GMR steel butt joints, semiautomatic welded in carbon dioxide 12GN2MFAYu steel butt joints, and submerged arc welded 15KhSND and 09G2S steel T-joints.
ISSN:0039-2316