| X射线应力测定中的交相关定峰法的改进 |
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| 引用本文： | 徐寒冰,宋小平,盖秀颖,覃明,李家宝. X射线应力测定中的交相关定峰法的改进[J]. 材料研究学报, 2000, 14(Z1): 13-18 |
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| 作者姓名： | 徐寒冰 宋小平 盖秀颖 覃明 李家宝 |
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| 作者单位： | 中国科学院金属研究所材料疲劳与断裂国家重点实验室 |
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| 基金项目： | 国家自然科学基金;59771069; |
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| 摘 要： | 对于X射线应力测定的交相关定峰方法,提出了对交相关函数曲线的峰顶作抛物线拟合和使定峰结果自协调的两种改进措施.对40SiMnCrNiMoV超高强度钢、含碳量为0.8%的高碳钢和GH39镍基合金三种试样所作的实验结果表明,该定峰法的定峰误差明显低于目前使用的半高宽定峰法的误差,改进措施可进一步提高定峰精度.
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| 关 键 词： | 交相关定峰法 抛物线拟合 自协调 定峰精度 |
| 文章编号： | 1005-3093(2000)S0-0013-06 |
| 修稿时间： | 1998-04-23 |
IMPROVEMENT OF CROSS CORRELATION METHOD FOR DETERMINING PEAK POSITIONS IN X-RAY STRESS MEASUREMENT |
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| XU Hanbing,SONG Xiaoping,GAI Xiuying,QIN Ming,LI Jiabao. IMPROVEMENT OF CROSS CORRELATION METHOD FOR DETERMINING PEAK POSITIONS IN X-RAY STRESS MEASUREMENT[J]. Chinese Journal of Materials Research, 2000, 14(Z1): 13-18 |
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| Authors: | XU Hanbing SONG Xiaoping GAI Xiuying QIN Ming LI Jiabao |
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| Abstract: | On cross correlation method for determining peak positions in X-ray stress measurement, two improvements have been put forward. Parabolic curve fitting at the crest part of the cross correlation function curve and coordinating manipulation for all peaks will increase the precision in peak position determination. The experimental results on super high strength steel 40SiMnCrNiMoV, high carbon steel T8 and Ni-based alloy GH39 showed that the error of peak position in cross correlation method was less than that in half-width method which is generally used. |
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| Keywords: | cross correlation method parabolic curve fitting coordination precision of peak position |
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