An Effective Method of Local Thermal Treatment for Sensitive NDE of Closed Surface Cracks
An Effective Method of Local Thermal Treatment for Sensitive NDE of Closed Surface Cracks
复制标题
闭合表面裂纹敏感无损检测的局部热处理的有效方法
DOI：
10.1080/09349840802503409
复制
发表时间：
2009
影响因子：
1.4
通讯作者：
Y. Kagiya
中科院分区：
文献类型：
--
作者：
S. R. Ahmed;M. Saka;Y. Matsuura;D. Kobayashi;Y. Miyachi;Y. Kagiya
可靠、准确的裂纹尺寸无损评估是一个重要的实际问题。通常的评估技术有时被发现不足以准确预测实际结构中闭合裂缝的大小。然而，如果裂缝没有闭合，这些技术可以成功地应用。本文报道了一种简单而有效的热处理方法，该方法能够在裂纹部分产生足够的拉伸热应力，从而可以在不受裂纹闭合问题影响的情况下对闭合裂纹进行评估。该处理是通过将适当的冷却剂喷到测试表面的局部区域来进行的。利用电势降技术验证了该热处理方法对封闭裂纹评价灵敏度的提高。结果表明，紧密耦合的直流电势降技术对裂纹闭合的敏感性低于常规的交流电势降技术。实验和模拟结果都牢固地建立了现有热处理方法对封闭表面裂纹尺寸进行无损敏感检测的可靠性和适用性。
Reliable and accurate nondestructive evaluation of crack size is an important practical issue. Usual techniques of evaluation are sometimes found to be inadequate to accurately predict the size of closed cracks in actual structures. However, the techniques can be applied successfully if the crack is free from crack closure. The present article reports a simple but effective method of thermal treatment which is capable of generating sufficient tensile thermal stress in the cracked part, thereby allowing evaluation of a closed crack without being affected by the problem of crack closure. The treatment is performed by applying the spray of a suitable coolant to a local area of the test surface. The electrical potential drop techniques are considered to verify the enhancement of evaluation sensitivity of closed cracks achieved by the present thermal treatment. The closely coupled direct current potential drop technique is verified to be less sensitive to crack closure than usual alternating current potential drop technique. Both the experiment and simulation firmly establish the reliability as well as suitability of the present thermal treatment for sensitively testing the size of closed surface cracks in a nondestructive way.
DOI：
--
发表时间：
2005
期刊：
Proceedings of JSNDI Spring Conference 2005
影响因子：
--
作者：
H.Okabe;(H.Tohmyoh;M.Saka)
通讯作者：
M.Saka)
使用紧密耦合探头对表面裂纹进行定量 NDE
DOI：
--
发表时间：
2006
期刊：
Proceedings of JSNDI the 9th Symposium on Nondestructive Surface Testing
影响因子：
--
作者：
H.Tohmyoh;(S.R.Ahmed;M.Saka)
通讯作者：
M.Saka)
闭合裂纹无损检测技术
DOI：
--
发表时间：
2004
期刊：
Proc.16th World Conf. on Nondestructive Testing (CD-ROM)
影响因子：
--
作者：
M.Saka;(H.Tohmyoh;Y.Kondo)
通讯作者：
Y.Kondo)