| X射线衍射法测量残余应力的相对误差及不确定度评定 |
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| 引用本文： | 张杰,付雪松,刘崇远.X射线衍射法测量残余应力的相对误差及不确定度评定[J].宇航材料工艺,2018,48(4):71-74. |
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| 作者姓名： | 张杰 付雪松 刘崇远 |
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| 作者单位： | 中国航空制造技术研究院;大连理工大学材料科学与工程学院 |
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| 摘 要： | 利用原位拉伸机进行单轴连续加载,对X射线法测量钛合金残余应力的应力增量进行验证;依据JJF 1059.1-2012标准,对钛合金高应力标样(-659±35)MPa的测量不确定度进行评定。结果表明,X射线衍射法测得残余应力的增量与理论计算应力增量有较好的一致性,随着应力水平的增加,应力增量的相对误差保持在11%以内。以测量重复性、应力常数K、应力因子M为不确定度分量对测量不确定度进行了评定,所得扩展不确定度为±32 MPa。
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| 关 键 词： | 钛合金 X射线衍射 残余应力 误差 不确定度 |
| 收稿时间： | 2017/7/17 0:00:00 |
Analysis on Relative Error and Uncertainty of Measurement of Residual Stress With X-ray Diffraction Method |
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| ZHANG Jie,FU Xuesong and LIU Chongyuan.Analysis on Relative Error and Uncertainty of Measurement of Residual Stress With X-ray Diffraction Method[J].Aerospace Materials & Technology,2018,48(4):71-74. |
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| Authors: | ZHANG Jie FU Xuesong and LIU Chongyuan |
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| Institution: | Avic Manufacturing Technology Institute, Beijing 100024,School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085 and School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085 |
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| Abstract: | By conducting uniaxial continuous loading on in-situ tensile machine, the validation of residual stress of Ti-6AL-4V alloy obtained by XRD method was studied. According to standard of JJF 1059.1-2012, the uncertainty of measurement of residual stress of high stress titanium alloy reference sample(-659± |
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| Keywords: | Titanium alloy X-ray diffraction Residual stress Relative error Uncertainty of measurement |
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