论文部分内容阅读
在频率为19.9千周和双振幅为28微米的磁致空泡腐蚀装置中,对包括铝、黄铜、铁和钢等金属进行了实验性的研究。观测了在试样上的腐蚀孔的寿命历程,同时也观察了某一单孔的寿命历程。发现了破损的两种不同类型并得出了如下结论:(1)金属材料的空化破损机理随着时间的推移从塑性破坏向脆性破坏转化;提出了能够定量判断破损过程的特征系数。(2)这种机理的转化不仅依赖于试验条件,而且依赖于试样的特性。(3)腐蚀速率变化的那一部分是起固于空化破损机理的转化。
Experimental studies on metals including aluminum, brass, iron and steel were carried out in a magnetostrictive corrosion device with a frequency of 19.9 kw and a double amplitude of 28 micrometers. The life history of the corrosion holes on the sample was observed, and the life history of a single hole was also observed. Two different types of damage were found and the following conclusions were drawn: (1) The mechanism of cavitation damage of metallic materials transformed from plastic failure to brittle failure with the passage of time; and the characteristic coefficient that can quantitatively determine the damage process was proposed. (2) The conversion of this mechanism depends not only on the test conditions, but also on the characteristics of the sample. (3) The part of the corrosion rate change is the conversion from the cavitation damage mechanism.