Evaluation of Shear Fatigue Delamination Strength of Porous Thermal Barrier Coatings by Torsion Pin-Test Method
Evaluation of Shear Fatigue Delamination Strength of Porous Thermal Barrier Coatings by Torsion Pin-Test Method
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扭销试验法评价多孔热障涂层的剪切疲劳分层强度
DOI：
10.1007/s11666-020-01049-y
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发表时间：
2020
影响因子：
3.1
通讯作者：
Masayuki Arai
中科院分区：
文献类型：
--
作者：
Kenji Kaneko;Masayuki Arai
一些多孔热障涂层（TBC）的剪切疲劳分层强度已使用扭力销试验方法进行了评估。测试的TBC的孔隙率为0-5%、5-10%、15-20%和25-35%。评估了 TBC 的剪切分层强度，并获得了循环扭转载荷下的剪切疲劳分层强度（S-N）曲线。通过压痕测试和相应的数值分析来评估 TBC 的杨氏模量，并将其表示为涂层孔隙率的函数。使用商用非线性有限元分析软件 MARC 进行的有限元分析表明，无论销钉直径如何，当发生分层时，在顶部涂层和粘合层之间的界面边缘周围可以观察到几乎相同的应力分布。因此，疲劳试验中仅使用销直径为4mm的试样。研究了无张力循环扭转下的剪切疲劳分层强度。如果同时施加扭转和张力，断裂将发生在面漆内部，而不是在粘合层界面处发生粘合。结果发现，归一化的 S-N 曲线除以简单扭转引起的临界分层应力，彼此一致。接下来，确定了各种多孔涂层在简单扭转下界面边缘奇异剪切应力场的应力强度因子（K），并推导了K与孔隙率Pv之间的关系。采用剪切应力奇异场强度（K）作为循环剪切下多孔热障涂层的疲劳分层准则。最后，可以确定具有任意孔隙率值的多孔 TBC 的 S-N 曲线。
The shear fatigue delamination strength of some porous thermal barrier coatings (TBCs) has been evaluated using the torsion pin-test method. The porosities of the tested TBCs were 0-5, 5-10, 15-20 and 25-35%. The shear delamination strength of the TBCs was evaluated and the shear fatigue delamination strength (S–N) curves were obtained under cyclic torsional loading. The Young’s modulus of the TBCs was evaluated by using indentation tests and the corresponding numerical analyses, and expressed as a function of coating porosity. Finite element analyses, using the commercial nonlinear finite element analysis software MARC, showed that almost the same stress distributions could be observed around the interface edge between the top coat and the bond coat when delamination occurred, regardless of the pin diameter. Therefore, only the specimens of 4-mm pin diameter were used in the fatigue test. The shearing fatigue delamination strength was investigated under cyclic torsion without tension. If combined torsion and tension were applied, fracture would occur inside the top coating instead of adhesively at the bond coat interface. It was found that the normalizedS–Ncurves, divided by the critical delamination stress due to simple torsion, coincided with each other. Next, the stress intensity factor (K) of the singular shear stress field around the interface edge was determined for various porous coatings under simple torsion, and the relationships betweenKand porosityPvwere derived. The strength (K) of the shear stress singularity field was adopted as the fatigue delamination criterion for the porous TBCs under cyclic shearing. Finally, theS–Ncurves could be determined for porous TBCs with any value of porosity.
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DOI：
10.2207/qjjws.9.167
发表时间：
1991
期刊：
Quarterly Journal of The Japan Welding Society
影响因子：
--
作者：
Y. Inoue;Akira Noutomi;Toyoaki Ono;Akio Izuha;M. Toyoda;M. Tsukamoto
通讯作者：
M. Tsukamoto
残余应力对涂层脱粘的影响——热喷涂体系的实验研究
DOI：
10.1016/0956-7151(94)90224-0
发表时间：
1994
期刊：
Acta Metallurgica Et Materialia
影响因子：
--
作者：
Y. Tsui;S. J. Howard;T. Clyne
通讯作者：
T. Clyne
改进的环剪切试验评价热喷涂层的附着强度
影响因子：
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作者：
M. Fukumoto;H. Murakami;I. Okane;H. Harada
通讯作者：
H. Harada
扭拉销试验法测定复合应力下WC-Co热喷涂层的剥离强度
影响因子：
3.1
作者：
K. Kaneko;K. Higaki
通讯作者：
K. Higaki
基于界面内聚模型和界面氧化过程的热障涂层剥离强度评价方法的提出
DOI：
10.2472/jsms.53.459
发表时间：
2004
期刊：
Journal of The Society of Materials Science, Japan
影响因子：
--
作者：
M. Arai
通讯作者：
M. Arai