Henry Granjon Prize Competition 2007 Winner, Category B “Materials Behaviour and Weldability” Development of a Compressive Residual Stress Field Around a Weld Toe by Means of Phase Transformations
Henry Granjon Prize Competition 2007 Winner, Category B “Materials Behaviour and Weldability” Development of a Compressive Residual Stress Field Around a Weld Toe by Means of Phase Transformations
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2007 年 Henry Granjon 奖竞赛 B 类“材料行为和可焊性”获奖者通过相变在焊趾周围形成压缩残余应力场
DOI：
10.1007/bf03266655
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发表时间：
2008
影响因子：
2.1
通讯作者：
F. M. Diez
中科院分区：
文献类型：
--
作者：
F. M. Diez
几十年来，机械或热引起的压缩应力场一直用于提高焊接接头的疲劳性能。通过焊缝金属中奥氏体的部分稳定以及随后受控分解为马氏体，可以在焊趾处产生压缩残余应力场，而无需进行焊后处理。通过适当调整锰和铬含量，已开发出产生马氏体显微组织的焊缝金属。该合金在低于热收缩效应可以抵消相引起的体积膨胀的温度下开始奥氏体到马氏体的转变。转变也在室温以上结束，以确保最大的体积膨胀。在锰铬合金中添加硅可产生具有大焊趾曲率半径的焊缝。
Mechanically- or thermally-induced compressive stress fields have been used for decades to increase the fatigue performance of welded joints. By means of partial stabilization of austenite in the weld metal and subsequent controlled decomposition into martensite, a compressive residual stress field can be induced at the weld toe without the need of post weld processing. By proper adjustment of manganese and chromium content, a weld metal that produces a martensitic microstructure has been developed. This alloy begins its austenite-to-martensite transformation at a temperature below that at which the thermal contraction effects can negate the phase-induced volumetric expansion. The transformation also ends above room temperature to ensure the maximum volumetric expansion. Silicon additions to the manganese-chromium alloy produced welds with large weld toe radii of curvature.