304奥氏体不锈钢晶间腐蚀敏感性的非线性超声表征
利用非线性超声检测技术并辅助于XRD与微观组织分析,探讨了在650℃经过2,6,10h敏化处理的304奥氏体不锈钢样品非线性超声特征参数的变化规律。结果表明：随着敏化时间的延长,归一化非线性系数单调增大;相比于固溶试样,经2,6,10h敏化处理后样品的归一化非线性系数分别增加28%,32%,43%,意味着以非线性系数表征304不锈钢的敏化度是可行的。分析认为：晶界析出碳化物（Cr23C6）与奥氏体基体产生的错配引发了局部应变场,干扰了超声波的传播;此外,随敏化时间延长,析出相的增加进一步加剧了超声波的畸变。...
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| Published in: | 材料工程 Vol. 45; no. 10; pp. 132 - 137 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | Chinese |
| Published: |
大连理工大学 材料科学与工程学院,辽宁 大连,116024
2017
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | 利用非线性超声检测技术并辅助于XRD与微观组织分析,探讨了在650℃经过2,6,10h敏化处理的304奥氏体不锈钢样品非线性超声特征参数的变化规律。结果表明：随着敏化时间的延长,归一化非线性系数单调增大;相比于固溶试样,经2,6,10h敏化处理后样品的归一化非线性系数分别增加28%,32%,43%,意味着以非线性系数表征304不锈钢的敏化度是可行的。分析认为：晶界析出碳化物（Cr23C6）与奥氏体基体产生的错配引发了局部应变场,干扰了超声波的传播;此外,随敏化时间延长,析出相的增加进一步加剧了超声波的畸变。 |
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| Bibliography: | Full-Text Search：Home｜Journal Papers｜About CNKI｜User Service｜FAQ｜Contact Us｜中文《Journal of Materials Engineering》 2017-10Add to Favorite Get Latest Update Nonlinear Ultrasonic Characterization for Intergranular Corrosion Susceptibility of 304 Austenitic Stainless SteelHOU Tian-yu;LI Ping;CHEN Lei;ZHAO Jie;LI Ting-ju;School of Materials Science and Engineering,Dalian University of Technology;; The variation law of nonlinear ultrasonic parameters for the samples sensitized at 650℃for2,6,10 hwas discussed using nonlinear ultrasonic testing technique and XRD pattern as well as microstructure.The results indicate that normalized nonlinear parameters（β/β0）of the samples show a monotonous growth trend with the increase of the sensitized time,and normalized nonlinear parameters（β/β0）of the samples sensitized with 2,6,10 hincrease to 28%,32% and 43% respectively compared with that of the base material,meaning that it is feasible to use nonlinear parameter to characterize the sensitivity degree.It is analyzed that the m |
| ISSN: | 1001-4381 1001-4381 |
| DOI: | 10.11868/j.issn.1001-4381.2016.000130 |