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航空学报 > 1993, Vol. 14 Issue (1): 49-55

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波形和频率对GC-4钢腐蚀疲劳裂纹扩展特性的影响

路民旭, 刘晓坤, 王建军, 傅祥炯, 郑修麟   

  1. 西北工业大学401教研室,西安 710072
  • 收稿日期:1990-05-10 修回日期:1991-12-29 出版日期:1993-01-25 发布日期:1993-01-25

EFFECTS OF WAVEFORM AND FREQUENCY OF CYCLIC LOAD ING ON CORROSION FCP FOR GC-4 STEEL IN 3.5% NaCl SOLUTION

Lu Ming-xu, Liu Xiao-kun, Wang Jian-jun, Fu Xiang-jun, Zheng Xiu-lin   

  1. Faculty 401 Northwestern Polytechnical University, Xi'an, 710072
  • Received:1990-05-10 Revised:1991-12-29 Online:1993-01-25 Published:1993-01-25

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摘要： 对三角波、正锯齿波、负锯齿波、方波和负脉冲波5种波形及3种频率为1Hz、5Hz、20Hz对GC-4(40CrMnSiMoVA)钢在3.5％NaCl中性溶液中疲劳裂纹扩展速率的影响进行了试验研究。结果表明,GC-4钢腐蚀疲劳(CF)具有显著的波形和频率效应;在CF过程中可同时存在静态应力腐蚀(SSCC)和动态应力腐蚀(DSCC),DSCC可以在K_(max)

关键词: 腐蚀疲劳, 应力腐蚀, 裂纹扩展, 速率, 波形, 频率

Abstract: In the present study,experimental investigations are carried out or the effects of the waveforms( including triangular, postitive sawtooth,negative sawtooth.scuare and negative pulse) and the frequencies (including 1, 5, 20Hz) of cyclic loading on the fatigue crack propaga-tion(FCP) for GC-4(40CrMnSiMoVA) steel.in the neutral solution of 3.5% NaCl.Test results show that the wavefrom and frequency have great effect on FCP rates of GC-4 steel in 3.5% NaCl solution.Moreover,the analysis of experimental results also show that the static stress corrosion cracking(SSCC) and the dynamic stress corrosion cracking(DSCC) can occur simultaneously in the corrosion fatigue(CF) process and that the DSCC may occur when Kmax

Key words: corrosion fatigue, stress corrosion cracking, crack propagation, waveform, fre-quency

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