Effect of Volume Fractions of Arc Sprayed Al Coatings on Tensile Properties of a Type 316 Steel Substrate
来源期刊：材料热处理学报2004年第5期
论文作者：KURZYD LIU Gui-min MA Li-li
关键词：arc spray coating; volume fraction; type 316 steel; tensile property;
摘 要：The effect of arc sprayed times, which are quantitatively described by the volume fraction of coatings, on the mechanical properties of type 316 steel, have been undertaken in the present work. Al wires were utilized as coatings materials.Tensile tests were carried out in the temperature range of Portevin-Le Chatelier (PLC) effect. It has been found that grains at edges and corners of the 316 steel specimens have been dramatically constricted by grit blasting and spraying. Grit blasting has been found to exert a shot-peening effect on the mechanical properties of 316 steel specimens. Coatings with lower values of coating volume fraction strengthen the coated specimens in the very similar way as blasting. While if the volume fraction of coating, (Vv)c, exceeds a critical value, (Vv)cc, softens the specimens. Specimens with low values of (Vv)c, have high values of flow stress, as well as higher values of work-hardening coefficient, θ. Calculations based on the experimental results show that the high thickness coatings have relatively lower contribution to the mechanical properties of specimens.
KURZYD1，LIU Gui-min2，MA Li-li2
(1.L)OWSKI Krzysztof Jan(L;
2.Academy of Armored Force Engineering, Beijing, China)
摘要:The effect of arc sprayed times, which are quantitatively described by the volume fraction of coatings, on the mechanical properties of type 316 steel, have been undertaken in the present work. Al wires were utilized as coatings materials.Tensile tests were carried out in the temperature range of Portevin-Le Chatelier (PLC) effect. It has been found that grains at edges and corners of the 316 steel specimens have been dramatically constricted by grit blasting and spraying. Grit blasting has been found to exert a shot-peening effect on the mechanical properties of 316 steel specimens. Coatings with lower values of coating volume fraction strengthen the coated specimens in the very similar way as blasting. While if the volume fraction of coating, (Vv)c, exceeds a critical value, (Vv)cc, softens the specimens. Specimens with low values of (Vv)c, have high values of flow stress, as well as higher values of work-hardening coefficient, θ. Calculations based on the experimental results show that the high thickness coatings have relatively lower contribution to the mechanical properties of specimens.
关键词:arc spray coating; volume fraction; type 316 steel; tensile property;
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