Repeatability of Contour Method Residual Stress Measurements for a Range of Materials, Processes, and Geometries
Repeatability of Contour Method Residual Stress Measurements for a Range of Materials, Processes, and Geometries
复制标题
对一系列材料、工艺和几何形状进行轮廓法残余应力测量的重复性
DOI：
10.1520/mpc20170044
复制
发表时间：
2018
影响因子：
1.1
通讯作者：
M. R. Hill
中科院分区：
文献类型：
--
作者：
M. Olson;A. Dewald;M. R. Hill
本文使用五次残余应力测量重复性研究来检验轮廓法的精度。评估的试件包括：铝T型材、异种金属填缝焊缝的不锈钢板、不锈钢锻件、电子束填缝焊缝的钛板以及镍盘锻件。选择这些样本是为了涵盖一系列典型材料和残余应力分布。每个重复性研究都包括对五到十个相似样本的轮廓法测量。残余应力测量完成后，进行分析以确定每个群体的重复性标准偏差。一般来说，各种重复性研究的结果是相似的。整个零件内部的重复性标准偏差往往相对较小，并且沿着零件周边存在具有较高重复性的局部区域。大多数横截面的重复性标准偏差范围从 5 MPa（铝 T 型材）到 35 MPa（不锈钢锻件）。这些结果为广泛的样本几何形状、材料和应力分布的轮廓方法提供了预期的精度数据。
This paper examines precision of the contour method using five residual stress measurement repeatability studies. The test specimens evaluated include: an aluminum T-section, a stainless steel plate with a dissimilar metal slot-filled weld, a stainless steel forging, a titanium plate with an electron beam slot-filled weld, and a nickel disk forging. These specimens were selected to encompass a range of typical materials and residual stress distributions. Each repeatability study included contour method measurements on five to ten similar specimens. Following completion of the residual stress measurements an analysis was performed to determine the repeatability standard deviation of each population. In general, the results of the various repeatability studies are similar. The repeatability standard deviation tends to be relatively small throughout the part interior and there are localized regions of higher repeatability along the part perimeter. The repeatability standard deviations over most of the cross-section range from 5 MPa, for the aluminum T-section, to 35 MPa, for the stainless steel forging. These results provide expected precision data for the contour method over a broad range of specimen geometries, materials, and stress profiles.