Indentation creep behavior of Fe-based amorphous coatings fabricated by high velocity Oxy-fuel
Indentation creep behavior of Fe-based amorphous coatings fabricated by high velocity Oxy-fuel
复制标题
高速氧燃料制备铁基非晶涂层的压痕蠕变行为
DOI：
10.1016/j.jnoncrysol.2018.09.018
复制
发表时间：
2019-01-15
影响因子：
3.5
通讯作者：
Kou, Shengzhong
中科院分区：
文献类型：
--
作者：
Li, Chunyan;Ding, Juanqiang;Kou, Shengzhong
在这项研究中，采用高速氧燃料（HVOF）技术在304不锈钢表面制备了铁基非晶涂层。涂层的显微硬度约为基体的3.5倍。此外，通过纳米压痕蠕变实验研究了保载时间对铁基非晶涂层蠕变变形行为的影响。实验结果表明，与保载时间相比，蠕变变形对施加的峰值载荷更为敏感。在相同保载时间下，高峰值载荷时的应力指数（n）小于低峰值载荷时的应力指数，在相同峰值载荷下，应力指数值随着保载时间的延长而减小，较高的应力指数值表明在较小峰值载荷和保载时间的条件下，非晶涂层对蠕变变形具有更强的抵抗力。
In this study, Fe-based amorphous coatings on 304 stainless steel surfaces were fabricated by high velocity oxy-fuel. The microhardness of the coatings was about 3.5 times than that of the substrate. Furthermore, the effect of the holding time on the creep deformation behavior of Fe-based amorphous coatings was investigated by performing nanoindentation creep experiments. Experimental results demonstrate that compared with holding time the creep deformation more sensitive to the applied peak load. At the same holding time, the stress exponent(n) at the high peak load is smaller than lower one, the stress exponent value decreases at the same peak load with the prolonging of holding time, higher stress exponent value indicates amorphous coatings have more resistance to creep deformation in the condition of smaller peak and holding time.