| 孙锦中,马世伟,蔡叶青,韦习成.P91钢高温热损伤的二次谐波评价[J].声学技术,2015,34(6):510~514 |
| P91钢高温热损伤的二次谐波评价 |
| Second-harmonic evaluation to the thermal damage of P91 steel |
| 投稿时间：2014-11-18 修订日期：2015-01-16 |
| DOI：10.16300/j.cnki.1000-3630.2015.06.008 |
| 中文关键词: 非线性超声 二次谐波 热损伤 P91钢 |
| 英文关键词: nonlinear ultrasonic second-harmonic thermal damage P91 steel |
| 基金项目:国家自然科学基金资助项目(61171145) |
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| 中文摘要: |
| P91钢是重要的核电承压钢结构材料,对其进行早期损伤评价具有重要意义。基于非线性超声理论,对P91钢不同温度的热损伤试样进行了非线性超声检测试验,逐级加大激励电压,基波幅度平方和二次谐波幅度呈现出良好线性关系,对基波和二次谐波进行频谱分析得到非线性系数,结果显示随着热处理温度的升高,非线性系数逐渐增大,可用于对这类材料热损伤进行有效评价。 |
| 英文摘要: |
| P91 steel is an important bearing steel material in nuclear power. It is meaningful to make early damage evaluation for P91 steel. A nonlinear ultrasonic test is implemented to P91 steel specimens heat-treated at different temperatures based on the theory of nonlinear ultrasound. The square of the fundamental amplitude and the Second-harmonic amplitude have a good linear relationship as progressively increasing the excitation voltage. The nonlinear parameter is calculated by analyzing the spectrums of fundamental and second-harmonic. The result shows that the nonlinear parameter increases with heat treatment temperature. It can be used for early thermal damage evaluation of such materials. |
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