摘要
经过1 min的超声振动空蚀试验后,在不锈钢试样表面形成的空蚀坑周围出现环形彩虹区.表面检测结果表明,该区域经历了高于300℃的高温加热过程.数值计算结果表明在空泡溃灭形成的微射流的高速冲击下,试样表面材料在短时间内发生的塑性变形所释放出的能量是造成材料局部升温的主要原因.在塑性变形相同的情况下,材料的导热系数是影响彩虹环区域大小的关键因素.
In the ultrasonic vibration cavitation erosion experiment,iridescent rings were observed around erosion pits on the stainless steel surface after one-minute test.Surface observations indicated that the zones within the iridescent rings experienced a tempering process at 300 ℃ or even higher.Here,the deformation process of the damaged surface was numerically simulated,and the heat released during this process was a possible way to form the iridescent rings.Also,the thermal conduction coefficient greatly affected the ring size.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2010年第4期328-332,共5页
Tribology
基金
国家科学基金委员会课题(50975158)
高等学校博士学科点专项科研基金课题(20070003103)的资助
关键词
空蚀
热效应
cavitation erosion
thermal effect