S30408钢应变强化效果的声发射测试实验研究
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摘要
根据Kaiser效应和应变强化原理,提出利用声发射特征参数确定Kaiser效应临界点应力,通过计算Felicity比值来对应变强化效果进行评估的方法。以S30408钢为例,对其应变强化过程及强化后二次加载过程进行声发射测试,实验结果表明,利用声发射累计能量和累计振铃计数等特征参数时间历程图,可得到试件应变强化后Kaiser效应点应力值。通过对实验数据的计算与分析,得到不同加载速率下各试件的Felicity比值均大于0.9,且在2.0mm/min加载速率下,Felicity比值最高,说明在该加载速率下应变强化效果最为理想。
According to Kaiser effect and the principle of strain strengthening,a method of determining critical point stress of Kaiser effect is put forward in this paper by using acoustic emission characteristic parameters,and then strain strengthening effect is evaluated by calculating Felicity ratio.Taking s30408 steel as an example,the strain strengthening process and the secondary loading process after strengthening were tested by acoustic emission.Experimental results show that the Kaiser effect point stress values of the after-hardening specimens can be obtained by using the time charts of characteristic parameters such as acoustic emission cumulative energy and cumulative count.Through the calculation and analysis of the experimental data,the Felicity ratios of all specimens under different loading rates are all greater than 0.9,and the Felicity ratio is the highest under 2.0 mm/min loading rate,which shows that the strain hardening effect is the most ideal under this loading rate.
According to Kaiser effect and the principle of strain strengthening,a method of determining critical point stress of Kaiser effect is put forward in this paper by using acoustic emission characteristic parameters,and then strain strengthening effect is evaluated by calculating Felicity ratio.Taking s30408 steel as an example,the strain strengthening process and the secondary loading process after strengthening were tested by acoustic emission.Experimental results show that the Kaiser effect point stress values of the after-hardening specimens can be obtained by using the time charts of characteristic parameters such as acoustic emission cumulative energy and cumulative count.Through the calculation and analysis of the experimental data,the Felicity ratios of all specimens under different loading rates are all greater than 0.9,and the Felicity ratio is the highest under 2.0 mm/min loading rate,which shows that the strain hardening effect is the most ideal under this loading rate.
引文
[1]郑津洋,李雅娴,徐平,等.应变强化用奥氏体不锈钢力学性能影响因素[J].解放军理工大学学报(自然科学版),2011,12(5):512-519(ZHENG Jinyang,LI Yaxian,XU Ping,et al.Influencing factors of mechanical properties of austenitic stainless steel for strain hardening[J].Journal of PLA University of Science and Technology(Natural Science Edition),2011,12(5):512-519(in Chinese))
[2]苏文娟.奥氏体不锈钢深冷容器应变强化不同保载方式的探讨[J].压力容器,2016,33(7):1-5(SU Wenjuan.Discussion on different load-keeping methods of strain hardening of austenitic stainless steel cryogenic vessels[J].Pressure Vessel Technology,2016,33(7):1-5(in Chinese))
[3]ASME BPVC-Ⅷ-Ⅰ-2013,Mandatory Appendix 44,Cold Stretching of Austenitic Stainless Steel Pressure Vessels[S].New York:The American Society of Mechanical Engineers,2013.
[4]岳亚霖,韦朋余,张炜,等.船用金属材料声发射信号特性研究[J].实验力学,2008,23(6):496-501(YUE Yalin,WEI Pengyu,ZHANG Wei,et al.Investigation on characteristics of acoustic emission for marine metal materials[J].Journal of Experimental Mechanics,2008,23(6):496-501(in Chinese))
[5]Rabiei Masoud,Modarres Mohammad.Quantitative methods for structural health management using in situ acoustic emission monitoring[J].International Journal of Fatigue,2013,49:81-89.
[6]白衫.深冷奥氏体不锈钢应变强化技术研究[D].上海:华东理工大学,2011(BAI Shan.Study on strain hardening technology of cryogenic austenitic stainless steel[D].Shanghai:East China University of Science and Technology,2011(in Chinese))
[7]沈功田.声发射检测技术及应用[M].北京:科学出版社,2015(SHEN Gongtian.Acoustic emission detection technology and application[M].Beijing:Science Press,2015(in Chinese))
[8]Direction of the Engineering Sector Policy and Strategy Committee.Cryogenic vessels-static vacuum insulated vessels(Part 2):fabrication and testing(EN13458-2-2002)[S].Brussels:Standards Policy and trategy Committee,2002.
[9]Lavrov A.The Kaiser effect in rocks:Principles and stress estimation techniques[J].International Journal of Rock Mechanics and Mining Sciences&Geomechanical Abstracts,2003,40:151-171.
[10]李浩然,杨春和,刘玉刚,等.花岗岩破裂过程中声波与声发射变化特征试验研究[J].岩土工程学报,2014,36(10):1915-1923(LI Haoran,YANG Chunhe,LIU Yugang,et al.Experimental study on the characteristics of acoustic wave and acoustic emission during granite rupture[J].Chinese Journal of Geotechnical Engineering,2014,36(10):1915-1923(in Chinese))
[11]GB/T 26646-2011,无损检测声发射检测小型部件声发射检测方法[S].北京:中国质检出版社,2012(GB/T26646-2011,Non-destructive testing-Acoustic emission detection of small components-Acoustic emission detection method[S].Beijing:China Zhijian Publishing House,2012(in Chinese))
[12]韩豫,陈学东,刘全坤,等.奥氏体不锈钢应变强化工艺及性能研究[J].机械工程学报,2012(2):87-92(HAN Yu,CHEN Xuedong,LIU Quankun,et al.Study on strain hardening process and properties of austenitic stainless steel[J].Journal of Mechanical Engineering,2012(2):87-92(in Chinese))
[2]苏文娟.奥氏体不锈钢深冷容器应变强化不同保载方式的探讨[J].压力容器,2016,33(7):1-5(SU Wenjuan.Discussion on different load-keeping methods of strain hardening of austenitic stainless steel cryogenic vessels[J].Pressure Vessel Technology,2016,33(7):1-5(in Chinese))
[3]ASME BPVC-Ⅷ-Ⅰ-2013,Mandatory Appendix 44,Cold Stretching of Austenitic Stainless Steel Pressure Vessels[S].New York:The American Society of Mechanical Engineers,2013.
[4]岳亚霖,韦朋余,张炜,等.船用金属材料声发射信号特性研究[J].实验力学,2008,23(6):496-501(YUE Yalin,WEI Pengyu,ZHANG Wei,et al.Investigation on characteristics of acoustic emission for marine metal materials[J].Journal of Experimental Mechanics,2008,23(6):496-501(in Chinese))
[5]Rabiei Masoud,Modarres Mohammad.Quantitative methods for structural health management using in situ acoustic emission monitoring[J].International Journal of Fatigue,2013,49:81-89.
[6]白衫.深冷奥氏体不锈钢应变强化技术研究[D].上海:华东理工大学,2011(BAI Shan.Study on strain hardening technology of cryogenic austenitic stainless steel[D].Shanghai:East China University of Science and Technology,2011(in Chinese))
[7]沈功田.声发射检测技术及应用[M].北京:科学出版社,2015(SHEN Gongtian.Acoustic emission detection technology and application[M].Beijing:Science Press,2015(in Chinese))
[8]Direction of the Engineering Sector Policy and Strategy Committee.Cryogenic vessels-static vacuum insulated vessels(Part 2):fabrication and testing(EN13458-2-2002)[S].Brussels:Standards Policy and trategy Committee,2002.
[9]Lavrov A.The Kaiser effect in rocks:Principles and stress estimation techniques[J].International Journal of Rock Mechanics and Mining Sciences&Geomechanical Abstracts,2003,40:151-171.
[10]李浩然,杨春和,刘玉刚,等.花岗岩破裂过程中声波与声发射变化特征试验研究[J].岩土工程学报,2014,36(10):1915-1923(LI Haoran,YANG Chunhe,LIU Yugang,et al.Experimental study on the characteristics of acoustic wave and acoustic emission during granite rupture[J].Chinese Journal of Geotechnical Engineering,2014,36(10):1915-1923(in Chinese))
[11]GB/T 26646-2011,无损检测声发射检测小型部件声发射检测方法[S].北京:中国质检出版社,2012(GB/T26646-2011,Non-destructive testing-Acoustic emission detection of small components-Acoustic emission detection method[S].Beijing:China Zhijian Publishing House,2012(in Chinese))
[12]韩豫,陈学东,刘全坤,等.奥氏体不锈钢应变强化工艺及性能研究[J].机械工程学报,2012(2):87-92(HAN Yu,CHEN Xuedong,LIU Quankun,et al.Study on strain hardening process and properties of austenitic stainless steel[J].Journal of Mechanical Engineering,2012(2):87-92(in Chinese))