Residual stresses of LTT welds in large-scale components

Residual stresses of LTT welds in large-scale components
复制标题

大型部件中 LTT 焊缝的残余应力

DOI:
10.1007/s40194-017-0502-5
复制
发表时间:
2017
影响因子:
2.1
通讯作者:
Schröpfer
Schröpfer
中科院分区:
材料科学3区
文献类型:
--
作者:
Dixneit;Wimpory;Kannengiesser;Gibmeier;Schröpfer

文献摘要

参考文献

被引文献

相似文献

焊接残余应力对焊接构件的冷裂纹和疲劳寿命的影响越来越重要。低相变温度(LTT)填料材料提供了通过调节马氏体相变温度(MS)来改变焊接过程中已经存在的残余应力的机会。本文研究了厚度分别为20 mm和25 mm的厚型钢焊接时的残余应力。残余应力状态,确定在顶部表面使用X射线衍射,以及在散装中子衍射。结果比较了传统焊缝和LTT焊缝中存在的残余应力时,多道焊接的大型组件被应用。重复相变的情况下,LTT焊缝是更重要的残余应力存在于现实生活中一样的接头。这说明了纵向方向上的顶表面,但对于大部分焊缝最为明显。与传统的填充焊丝相比,有害的拉伸残余应力主要在本体中减少,甚至在厚钢截面的多道焊接中也是如此。
Residual stresses of welds become more and more important influencing cold cracking as well as the fatigue life of welded components. Low transformation temperature (LTT) filler materials offer the opportunity to alter the residual stresses already during the welding process by means of adjusted martensite phase transformation temperature (MS). In the current paper, welding residual stresses are studied putting the focus onMSwhile joining heavy steel sections with a thickness of 20 and 25 mm, respectively. The residual stress state was determined at the top surface using X-ray diffraction as well as in the bulk by neutron diffraction. The results compare the residual stresses present in a conventional weld and LTT welds when multi-pass welding of large-scale components was applied. Repeated phase transformation in the case of the LTT weld is more vital for the residual stresses present in the real-life-like joints. This accounts for the top surface in longitudinal direction but is most pronounced for the bulk of the welds. Detrimental tensile residual stresses are mainly reduced in the bulk in comparison to a conventional filler wire even in multi-pass welds of thick steel sections.
DOI: 10.1115/pvp2007-26544
发表时间: 2007
影响因子: 0.8
作者:
J. Francis;H. Stone;S. Kundu;R. Rogge;H. Bhadeshia;P. Withers;L. Karlsson
通讯作者: L. Karlsson
DOI: 10.4028/www.scientific.net/amr.996.469
发表时间: 2014
期刊: Advanced Materials Research
影响因子: --
作者:
通讯作者: --
DOI: 10.4028/www.scientific.net/msf.681.37
发表时间: 2011
期刊: Materials Science Forum
影响因子: --
作者:
A. Kromm;T. Kannengiesser;J. Altenkirch;J. Gibmeier
通讯作者: J. Gibmeier
DOI: 10.1179/1362171813y.0000000162
发表时间: 2014-01-01
影响因子: 3.3
作者:
Ramjaun, T.;Stone, H. J.;Bhadeshia, H. K. D. H.
通讯作者: Bhadeshia, H. K. D. H.
DOI: 10.21741/9781945291173-38
发表时间: 2016
期刊:
影响因子: --
作者:
Dixneit;Kannengiesser;Gibmeier
通讯作者: Gibmeier