Fatigue of high strength steel joints welded with low temperature transformation consumables

IF 5.7 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2009-10-01 DOI:10.1016/j.engfailanal.2009.02.013

Z. Barsoum , M. Gustafsson

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引用次数: 54

Abstract

In the present paper constant (CA) and variable amplitude (VA) fatigue testing have been carried out on out-of plane gusset fillet welded high strength steel joints. The joints were welded with conventional weld filler material and martensitic low transformation temperature weld filler, LTT, in order to study the influence of the residual stress on the fatigue strength. Residual stress measurements were carried out close to the weld toe using X-ray diffraction technique in order to study the relaxation due to VA fatigue. The residual stress showed different level of relaxation depending on the VA spectrum loading used. The LTT joints show ∼40% increase in mean fatigue strength compared to the conventional joints in CA. The LTT joints show ∼12% increase in mean fatigue strength compared to the conventional joints. The LTT joints show 33% increase in mean fatigue strength in CA compared to VA testing. However, the improvement of the fatigue strength is less significant in variable amplitude testing mainly due to the relaxation of the compressive residual stresses.

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低温相变耗材焊接高强度钢接头的疲劳研究

本文对高强度钢板面外折角焊接接头进行了恒疲劳试验和变幅疲劳试验。采用常规焊缝填充材料和马氏体低温钎料(LTT)焊接接头，研究残余应力对接头疲劳强度的影响。利用x射线衍射技术对焊缝脚趾附近的残余应力进行了测量，以研究VA疲劳引起的松弛现象。残余应力表现出不同程度的松弛，取决于所使用的VA谱加载。与常规接头相比，LTT接头的平均疲劳强度提高了~ 40%。与常规接头相比，LTT接头的平均疲劳强度提高了~ 12%。与VA试验相比，CA试验中LTT接头的平均疲劳强度提高了33%。而在变幅试验中，疲劳强度的提高不明显，这主要是由于残余压应力的松弛。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.