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Licensed Unlicensed Requires Authentication Published by De Gruyter April 22, 2016

Effect of indentation conditions on the cracking behavior of a FeCrBSi coating

Auswirkungen der Eindruckbedingungen auf das Rissverhalten einer FeCrBSi-Beschichtung
  • Ya-nan Song , Bin-shi Xu , Hai-dou Wang , Ming Liu and Zhong-yu Piao
From the journal Materials Testing


A detector combining indentation method and acoustic emission (AE) technique was developed for evaluating the bonding strengths of sprayed coatings. In order to study the effect of indentation conditions on cracking failure behavior of sprayed coating, FeCrBSi coating was prepared by plasma spraying technique. The AE signals during indentation test were abstracted and investigated. The morphologies of indented samples were observed by scanning electronic microscopy (SEM). The results indicate that indentation equipment can induce the cracking failure of coating and AE technique can define the critical statues. The test by interior load was feasible and accurate for evaluating the bonding strength. The key influential factor of indenter lied in the contact area between indenter and coating. The loading rate had little effect on AE signal. The loading conditions were optimized to use diamond indenter with interior load and a loading rate of 100 pulses per second.


In der diesem Beitrag zugrunde liegenden Studie wurde ein Detektor entwickelt, der das Eindruckverfahren mit der akustischen Emmissiontechnik (Acoustic Emission (AE)) kombiniert, um die Bindungsfestigkeit von Spritzschichten zu bestimmen. Um die Auswirkungen der Eindruckbedingungen auf das Rissverhalten von Spritzschichten zu untersuchen, wurde eine FeCrBSi-Beschichtung mittels Plasmaspritzens vorbereitet. Die akustischen Emissionssignale während des Eindringversuches wurden abstrahiert und untersucht. Die Morphologien der eingedrückten Proben wurden mittels Rasterelektronenmikroskopie (REM) untersucht. Die Ergebnisse deuten darauf hin, dass mit der Eindruck-Vorrichtung Risse in der Beschichtung verursacht werden können und dass die AE-Technik den kritischen Zustand diesbezüglich bestimmen kann. Der Versuch mit interner Belastung war durchführbar und genau, um die Bindungsfestigkeit zu berechnen. Der Haupteinflußfaktor auf den Eindringkörper war die Berührungsfläche zwischen Eindringkörper und Beschichtung. Die Belastungsgeschwindigkeit hatte dabei einen geringen Effekt auf das AE-Signal. Die Belastungsbedingungen wurden optimiert, um einen Diamant-Indenter bei interner Belastung und einer Belastungsgeschwindigkeit von 100 Pulsen pro Sekunde zu verwenden.

*Correspondence Address, Dr. Hai-dou Wang, National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, No.21 Dujiakan, Fengtai District, Beijing, 100072, PR China, E-mail:

Ya-nan Song, born in 1987, graduated with a Master of Science in Materials Science and Engineering from the Academy of Armored Forces Engineering, Beijing, China, in 2012. He continued studying for a Doctor's degree at the same faculty in March 2013. His main research areas include spraying process optimization and performance evaluation of surface coatings.

Prof. Bin-shi Xu, member of the Chinese Academy of Engineering, born in 1931, graduated with a Bachelor's degree from Harbin Institute of Technology in Mechanism Manufacturing and Welding, in 1954. He works as Professor at the National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing, China. He is a leading expert in equipment maintenance engineering, surface engineering and remanufacturing engineering.

Dr. Hai-dou Wang, born in 1969, received his PhD from the Department of Mechanical Engineering, Tsinghua University, Beijing, China, in 2003. He works as Professor at the National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing, China. He has studied at George Washington University as a visiting scholar for one year. His main research interests include remanufacturing engineering, surface engineering and basic theory in tribology.

Ming Liu, born in 1979, graduated with a Master of Science in Materials Science and Engineering from the Academy of Armored Forces Engineering, Beijing, China, in 2006. Now, he works as a lecturer and is studying for a Doctor's degree at the same faculty. His main researches focus on surface coatings and plasma spraying techniques.

Dr. Zhong-yu Piao, born in 1982, graduated with a Doctor's degree in Machinery Design and Theory from Yanshan University, China in 2011. He works as Associate Professor at the College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China. His main research interests focus on life prediction for manufacturing products.


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Published Online: 2016-04-22
Published in Print: 2016-05-02

© 2016, Carl Hanser Verlag, München

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