HAN Wei
,
MENG Xian-ming
,
ZHANG Jun-bao
,
ZHAO Jie
钢铁研究学报(英文版)
304 stainless steel coating was deposited on the IF steel substrate by cold gas dynamic spraying (CGDS), and the elastic modulus of the 304 stainless steel coating was studied. The elastic modulus of cold sprayed 304 stainless steel coating was measured using the three-point bend testing and the compound beam theory, and the other mechanic parameters (such as the equivalent flexural rigidity and the moment of inertia of area) of the coatings were also calculated using this compound beam theory. It is found that the calculated results using the above methods are accurate and reliable. The elastic modulus value of the cold sprayed 304 stainless steel coating is 1179×105 MPa, and it is slightly lower than the 304 stainless steel plate (about 2×105 MPa). It indicates that the elastic modulus of the cold sprayed coatings was quite different from the comparable bulk materials. The main reason is that the pores and other defects are existed in the coatings, and the elastic modulus of the coatings also depends on varies parameters such as the feed stock particle size, porosity, and processing parameters.
关键词:
cold gas dynamic spraying
,
304 stainless steel coating
,
three-point bend testing
,
compound beam theory
,
elastic modulus
ZHU Shijie
,
ZHAO Jie
,
WANG Fugang
,
CAO Zhiben Dalian University of Technology
,
Liaoning
,
China. To whom correspondence should be addressed.
材料科学技术（英）
The effects of the eutectic carbides rand secondary carbides on creep deformation and rupture in smooth bars and CT specimens have been studied. The results show that the resistance of the eutectic carbides of skeleton shape to crack growth is larger than that of the blocky shape carbides. The dendritic segregation of secondary carbides promotes the creep ductility. As the secondary carbide particles become coarser, the creep ductility increases and the crack growth rate decreases. However, if the size of secondary carbide is too large, the creep strength decreases too much and therefore crack growth rate increases.
关键词:
creep
,
null
,
null
,
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