轧制铝合金的X-射线法残余应力测试
发布时间：2019-04-21 20:21
【摘要】：在轧制铝合金的X射线残余应力测试中,由于存在择优取向,在不同Ψ角位置参与衍射的晶面数目不同,造成不同Ψ角位置的衍射强度出现差异,影响衍射峰的θ-2θ位置的判断,进而2θ-sin2Ψ和Ip-sin2Ψ出现不同程度的震荡,造成测试结果准确度下降.文中采用"多晶面衍射法"从衍射峰形和强度分布出发,分析了轧制铝合金测试过程中不同衍射晶面随Ψ角位置衍射强度的变化,然后选择合适的峰形进行拟合.结果表明,采用"多晶面法衍射"可以保证衍射峰型和强度比,进而得到的测试结果和理论值吻合度较好,满足对轧制铝合金测试结果的要求.
[Abstract]:In the X-ray residual stress measurement of rolled aluminum alloy, due to the existence of preferred orientation, the number of crystal planes involved in diffraction at different angle positions is different, resulting in the difference of diffraction intensity at different angle positions. It affects the judgment of 胃-2 胃 position of diffraction peak, and then the oscillation of 2 胃-sin2 and Ip-sin2 is different degree, which results in the decrease of accuracy of test results. Based on the distribution of diffraction peak shape and intensity, the variation of diffraction intensity of different diffractive crystal planes in rolling aluminum alloy is analyzed in this paper, and then the suitable peak shape is selected to fit the diffractive intensity of rolling aluminum alloy in the process of measuring the diffraction peak shape and intensity distribution of diffractive peak by "polycrystal plane diffraction method". The results show that the diffraction peak shape and strength ratio can be guaranteed by "polycrystal plane diffraction", and the obtained results and theoretical values have a good kiss degree, which can meet the requirements for the test results of rolled aluminum alloys.
【作者单位】： 北京工业大学材料科学与工程学院;
【基金】：国家重点基础研究发展计划资助项目(973计划,2012CB619500)
【分类号】：TG339;TG115.22
本文编号：2462524
[Abstract]:In the X-ray residual stress measurement of rolled aluminum alloy, due to the existence of preferred orientation, the number of crystal planes involved in diffraction at different angle positions is different, resulting in the difference of diffraction intensity at different angle positions. It affects the judgment of 胃-2 胃 position of diffraction peak, and then the oscillation of 2 胃-sin2 and Ip-sin2 is different degree, which results in the decrease of accuracy of test results. Based on the distribution of diffraction peak shape and intensity, the variation of diffraction intensity of different diffractive crystal planes in rolling aluminum alloy is analyzed in this paper, and then the suitable peak shape is selected to fit the diffractive intensity of rolling aluminum alloy in the process of measuring the diffraction peak shape and intensity distribution of diffractive peak by "polycrystal plane diffraction method". The results show that the diffraction peak shape and strength ratio can be guaranteed by "polycrystal plane diffraction", and the obtained results and theoretical values have a good kiss degree, which can meet the requirements for the test results of rolled aluminum alloys.
【作者单位】： 北京工业大学材料科学与工程学院;
【基金】：国家重点基础研究发展计划资助项目(973计划,2012CB619500)
【分类号】：TG339;TG115.22
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