Abstract Deformations within a microstructural gradient zone of stainless steel repaired specimens are investigated. The repair, added material by Directed Energy Deposition over a hot rolled sheet substrate, was tested in monotonic tensile experiments. In situ tests, scanning electron microscope images combined with high resolution digital image correlation and electron backscatter diffraction maps, permitted to monitor the local strain distribution. The strain distribution is homogeneous in the substrate and exhibits a heterogeneous pattern in the printed part with localization correlating spatially with the position of interlayers. The vicinity of the interface has smaller strains and exhibits larger hardness.

中文翻译：

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用于定向能量沉积修复不锈钢显微组织应变分析的高分辨率数字图像相关性

摘要 研究了不锈钢修复试样微观结构梯度区内的变形。通过定向能量沉积在热轧板基材上添加材料的修复在单调拉伸实验中进行了测试。原位测试，扫描电子显微镜图像结合高分辨率数字图像相关和电子背散射衍射图，允许监测局部应变分布。基板中的应变分布是均匀的，并且在印刷部件中呈现出异质图案，其局部化与夹层的位置在空间上相关。界面附近的应变较小，硬度较大。