Characterization of residual stresses in Eurofer welded specimens: Measurements by neutron diffraction and comparison with weld modeling
Characterization of residual stresses in Eurofer welded specimens: Measurements by neutron diffraction and comparison with weld modeling
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DOI：
10.1016/j.jnucmat.2010.12.051
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发表时间：
2011-10-01
影响因子：
3.1
通讯作者：
Diegele, E.
中科院分区：
文献类型：
--
作者：
Coppola, R.;Asserin, O.;Diegele, E.
Eurofer-97 模型板上双束激光焊接的应力场已通过中子衍射测量实验确定。测量是在 ILL-格勒诺布尔在三个主要方向、距焊缝不同距离以及焊缝内部进行的。在与技术应用最相关的纵向方向上，这些实验结果与有限元数值方法获得的结果之间有很好的一致性：焊缝内部发现高达 750 MPa 的拉应力，并且随着距焊缝中心距离的增加而迅速减小。在其他两个方向上，远离焊缝时，实验确定的应力和计算得到的应力之间的一致性仍然很好；在焊缝内部，实验数据受到 X 射线衍射检测到的强烈织构的影响，这可能是由结构的加热和随后的冷却产生的。 (C) 2010 Elsevier B.V. 保留所有权利。
The stress field of a dual-beam laser weld on a Eurofer-97 model plate has been experimentally determined by neutron diffraction measurements. The measurements were carried out at the ILL-Grenoble, in the three principal directions, at different distances from the weld and inside the weld itself. In the longitudinal direction, the most relevant for technical applications, there is good agreement between these experimental results and results obtained by finite element numerical methods: tensile stresses as high as 750 MPa are found inside the weld, rapidly decreasing with increasing distance from the weld centre. In the two other directions the agreement between experimentally determined and calculated stresses is still good far from the weld; inside the weld the experimental data are affected by the strong texture detected by X-ray diffraction, possibly produced by the heating and subsequent cooling of the structure. (C) 2010 Elsevier B.V. All rights reserved.