| 宋俊俊,胡 斌,王 强,孙 亮,原可义,胡 栋,陈 涛.反射式非线性超声评估 P91 钢蠕变状态的试验探究[J].电子测量与仪器学报,2022,36(7):99-105 |
| 反射式非线性超声评估 P91 钢蠕变状态的试验探究 |
| Experimental study on creep performance evaluation of P91 steelby reflective nonlinear ultrasonic measurement |
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| DOI： |
| 中文关键词: 蠕变 超声非线性参量 反射式检测方法 P91 钢 |
| 英文关键词:creep ultrasonic nonlinear parameters reflective detection P91 steel |
| 基金项目:国家自然科学基金（51671216）、浙江省“尖兵”“领雁”研发攻关计划（2022C03179）、浙江省市场监督管理局科技计划（20190325）项目资助 |
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| 中文摘要: |
| 超声非线性参量作为一种表征金属材料蠕变状态的参数,通常采用透射法进行检测时需要发射换能器和接收换能器分
置于工件两侧,很难用于在役大型工件蠕变状态检测。 针对透射法存在的问题设计了反射式非线性超声检测试验系统(只需
一个超声换能器),通过分析一次底波的反射信号获得材料蠕变状态的信息。 对带有焊缝的 P91 钢试块且蠕变时间分别为
0 h、120 h、250 h,进行非线性超声检测。 实验结果表明,对于蠕变时间 120 h 和 250 h 的试块母材区,二次谐波非线性参量相对
无蠕变时增加量为 2. 9%、17. 4%,试块焊缝区相对增加量为 2%,23. 6%,试块热影响区相对增加量为 5. 6%、34%。 |
| 英文摘要: |
| As a parameter to characterize the creep state of metal materials, it usually requires the emission ultrasonic probe and the
receiving probe to be in coaxial position in penetration detecting. It is difficult to align the position of the emission probe and the
receiving probe accurately when the penetration method is used for detecting and acquisition. A set of reflective nonlinear ultrasonic
experiment system is designed to solve the problem. The detection information is extracted by analyzing the reflection signal of a bottom
wave. The creep properties of P91 specimen with weld structure and creep time of 0 h, 120 h and 250 h were detected by the experiment
system. The results show that the ultrasonic second harmonic nonlinear parameters after the 120 h and 250 h creep time of the P91 steel
test block, the relative change of the base metal area is 2. 9%, 17. 4%, the weld zone is 2%, 23. 6%, the heat zone is 5. 6%, 34%. |
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