Residual-stress measurement in socket welded joints by neutron diffraction
Residual-stress measurement in socket welded joints by neutron diffraction
复制标题
通过中子衍射测量承插焊接头的残余应力
DOI：
10.2472/jsms.44.1464
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
S. Funahashi
中科院分区：
文献类型：
--
作者：
M. Hayashi;M. Ishiwata;N. Minakawa;S. Funahashi
晶格间距的中子衍射测量提供了铁素体钢承插接头焊缝附近残余应力的空间分布图。在环向熔接区和热影响区存在大于200MPa的高拉应力。而焊缝根部轴向最大拉应力约为110MPa，相对低于疲劳试验结果的期望值。在熔接区表面附近发现了平衡压应力。在625°C下进行2小时的热处理足以消除插口焊缝中的残余应力。
Neutron diffraction measurements of lattice spacings provide the spatial map of residual stress near welds in ferritic steel socket joints. The high tensile stress greater than 200MPa was found in the fusion and heat-affected zones in the hoop direction. However, the highest tensile stress in the axial direction at the weld root was about 110MPa relatively lower than the expected value from the fatigue test results. The balancing compressive stress was found near the surface of the socket weld fusion zone. Heat treatment at 625°C for 2 hours was sufficient for the relief of residual stress in socket welds.