Stress Evaluation in Material with Coarse Grains Using Area Detector
Stress Evaluation in Material with Coarse Grains Using Area Detector
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使用区域检测器评估粗晶材料的应力
DOI：
10.2472/jsms.63.527
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
S. Zhang
中科院分区：
文献类型：
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作者：
Kenji Suzuki;T. Shobu;A. Shiro;S. Zhang
螺旋缝系统和DSTM（衍射斑点跟踪法）正在发展中，以评估内部应力的粗晶粒材料。改进了螺旋狭缝系统，使规管体积的长度与衍射角无关。为了验证这种先进的螺旋缝系统的性能，对粗晶试样进行了弯曲应力测试。实测弯曲应力的分布与外加弯曲应力的分布基本一致。结果表明，先进的螺旋狭缝系统与DSTM相结合，可用于粗晶材料的内应力测量。采用熔化焊和TIG焊的方法制备了镁合金板材的焊接试件。利用DSTM绘制了试样横截面的残余应力图。另一方面，焊接试样的残余应力的有限元方法进行了模拟。测量的残余应力与模拟结果相似，并且还使用DSTM测量了由于挤压引起的残余应力。因此，DSTM适用于焊接零件的应力测量。
The spiral slit-system and DSTM (diffraction spot trace method) are under development in order to evaluate internal stresses of materials with coarse grains. The spiral slit-system was improved so that the length of the gauge volume is independent of the diffraction angle. The bending stress in the specimen with coarse grains was measured in order to confirm performance of this advanced spiral slit-system. The distribution of the measured bending stress coincided with the applied bending stress. As a result, it was proved that the combination of the advanced spiral slit-system and the DSTM is useful for the internal stress measurement of materials with coarse grains. The welded specimen of a Mg-alloy plate was prepared by melt-run with TIG welding. The residual stress map in the cross-section of the specimen was made using the DSTM. On the other hand, the residual stresses of the welded specimen were simulated by a finite element method. The measured residual stresses were similar to the simulated results, and the residual stresses due to extrusion were measured also using the DSTM. Therefore, the DSTM is suitable for the stress measurement of weld parts.