A correlation between fracture toughness and cohesion strength of molybdenum thermal sprayed coatings

被引：5
|
作者：
Paraschiv, Alexandru [1 ]
Matache, Gheorghe [1 ]
Puscasu, Cristian [1 ]
Grigorescu, Mihaela [1 ]
机构：
[1] Romanian Res & Dev Inst Gas Turbines COMOTI, 220D Iuliu Maniu Ave, Bucharest 6, Romania
来源：
13TH NATIONAL CONGRESS ON THEORETICAL AND APPLIED MECHANICS (NCTAM 2017) | 2018年 / 145卷
关键词：
INDENTATION;
D O I：
10.1051/matecconf/201814502007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Molydenum thermal sprayed coatings on steel substrate using electric arc, atmospheric plasma spray and high velocity oxy-fuel spray were investigated. The tensile bond strength tests were made in order to examine the degree of adhesion/cohesion strength of coatings. The Vickers indentation fracture toughness tests were made on parallel and perpendicular direction to the coating-substrate interface in order to examine the fracture toughness of the material in relationship with the microstructure, indentation direction, hardness and the length of microcracks developed under different loads. It was found that the fracture toughness is influenced by the direction and load of indentation. It was established a correlation between the fracture toughness and cohesion strength of Mo coatings and a general trend was described.
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页数：9
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