显色法检测表征304不锈钢的疲劳损伤过程
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摘要
采用显色法对304不锈钢疲劳过程的表面损伤进行颜色检测及表征,结合扫描电镜观察,分析了不同损伤阶段的显色特征,以及表面粗糙度和应力幅对显色检测结果的影响。结果表明:随着试样变形程度的增大,显色经历了大面积均匀显色、局部区域显色和带状显色3个阶段,分别对应了表面钝化膜破坏及微裂纹萌生、主裂纹形成和长裂纹扩展3个阶段;试样表面越粗糙、疲劳试验应力幅越大,显色检测值也越大。
Color-change method was used to detect and characterize the surface damage of 304 stainless steel in the process of fatigue.And combined with scanning electron microscopy(SEM)observation,the color-change characteristic during different fatigue damage stages,as well as the effect of surface roughness and stress amplitude on color-change test results was studied.The results show that with the increase of sample deformation,the colorchange experienced three stages,i.e.,the area of color-change was large and homogeneous,the area of color-change was partial,and the area of color-change was similar to the shape of surface cracks.These three stages were corresponding to the damage of the surface passivation film and initiation of micro cracks on the surface,the main crack initiation,and the long main crack propagation respectively.The higher sample surface roughness and the greater stress amplitude of the fatigue test were,the higher color-change values were.
Color-change method was used to detect and characterize the surface damage of 304 stainless steel in the process of fatigue.And combined with scanning electron microscopy(SEM)observation,the color-change characteristic during different fatigue damage stages,as well as the effect of surface roughness and stress amplitude on color-change test results was studied.The results show that with the increase of sample deformation,the colorchange experienced three stages,i.e.,the area of color-change was large and homogeneous,the area of color-change was partial,and the area of color-change was similar to the shape of surface cracks.These three stages were corresponding to the damage of the surface passivation film and initiation of micro cracks on the surface,the main crack initiation,and the long main crack propagation respectively.The higher sample surface roughness and the greater stress amplitude of the fatigue test were,the higher color-change values were.
引文
[1]边春华,方可伟,张维,等.高加抽汽管疏水阀气动执行机构螺栓断裂原因分析[J].理化检验-物理分册,2013,49(11):773-776.
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[10]张国华,李敬高.奥氏体不锈钢应力腐蚀分析研究[J].焊接技术,2002,31(6):53-54.
[11]程从前,曹铁山,宋冠宇,等.一种显色表征不锈钢钝化膜质量的新方法[J].原子能科学技术,2013,47(10):1872-1877.
[12]程从前,付琴琴,曹铁山,等.钝化膜质量对奥氏体不锈钢耐蚀性的影响及显色检测[J].材料工程,2013(8):65-69.
[13]洪友士,方飚.疲劳短裂纹萌生及发展的细观过程和理论[J].力学进展,1993,23(4):468-486.
[14]GB/T 25150-2010工业设备化学清洗中奥氏体不锈钢钝化膜质量的检测方法蓝点法[S].
[2]熊勇,乐淑君,陈昌达,等.1Cr18Ni9Ti油管裂纹分析[J].理化检验-物理分册,2013,49(3):182-184.
[3]DELOSRIOS E,WALLEY A,MILAN M,et al.Fatigue crack initiation and propagation on shot-peened surfaces in A316 stainless steel[J].International Journal of Fatigue,1995,17(7):493-499.
[4]王亮,丁传富.高温下直流电位法测量裂纹长度的应用[J].理化检验-物理分册,2006,42(9):454-456.
[5]曾海云,段怡雄,王平华.35CrMo车轴疲劳裂纹超声波检测工艺方法[J].电力机车与城轨车辆,2005,28(6):34-37.
[6]曹益平,李路明,黄刚,等.基于电磁检测原理的疲劳裂纹检测方法[J].清华大学学报(自然科学版),2005,45(11):1453-1455,1459.
[7]李耀东,黄成祥,侯力.模态声发射技术在构件疲劳裂纹检测中的应用[J].振动与冲击,2005,24(2):122-125.
[8]陈珍春,杨先顺.工程起重机的疲劳裂纹和磁粉探伤[J].建筑机械,2004(5):55-57.
[9]王亮,黄新跃,郭广平.直流电位法检测高温合金的疲劳裂纹扩展性能[J].理化检验-物理分册,2011,47(8):480-482,486.
[10]张国华,李敬高.奥氏体不锈钢应力腐蚀分析研究[J].焊接技术,2002,31(6):53-54.
[11]程从前,曹铁山,宋冠宇,等.一种显色表征不锈钢钝化膜质量的新方法[J].原子能科学技术,2013,47(10):1872-1877.
[12]程从前,付琴琴,曹铁山,等.钝化膜质量对奥氏体不锈钢耐蚀性的影响及显色检测[J].材料工程,2013(8):65-69.
[13]洪友士,方飚.疲劳短裂纹萌生及发展的细观过程和理论[J].力学进展,1993,23(4):468-486.
[14]GB/T 25150-2010工业设备化学清洗中奥氏体不锈钢钝化膜质量的检测方法蓝点法[S].