应力分量对黄铜Ⅱ型缺口试样应力腐蚀的影响

中国腐蚀与防护学报

1990, Vol. 10

Issue (1): 51-58

研究报告

本期目录 | 过刊浏览

应力分量对黄铜Ⅱ型缺口试样应力腐蚀的影响

王核力;褚武扬;肖纪美

北京科技大学;北京科技大学;北京科技大学

THE EFFECT OF STRESS COMPONENTS ON STRESS CORROSION OF NOTCHED BRASS SPECIMENS UNDER MODE II LOADING

Wang Heli Chu Wuyang Hsiao Chimei (University of Science and Technology;Beijing)

全文: PDF(2767 KB)

摘要: 用Ⅰ型缺口试样研究丁黄铜在含5 g/l cucl_2的1 N NH_4OH 水溶液中应力腐蚀时应力分量的作用。由门槛值的测量、交变载荷的作用、室温蠕变的影响、断裂过程的金相观察及断口形貌等结果,可以确认;黄铜不论是在氨水中应力腐蚀或腐蚀疲劳,还是在空气中疲劳,裂纹都从Ⅱ型缺口试样的最大正应力处(0=-110°)萌生,并沿该处的最大剪应力方向(α=-35°))扩展。这表明,正应力在这种应力腐蚀体系中起主导作用,这和正应力能促进阳极溶解过程有关。

Abstract：The effects of stress components on stress corrosion of notched brass specimens under Mode Ⅱ loading in 1N NH_4 OH+CuCl_2 5g/1 aqueous solution were investigated.Based upon the experimental results, including threshold values under static loading,the effects of alternating loading and room temperature creep,as well as metallographic observations of the fractography,it is concluded that notwithstanding stress corrosion or corrosion fatigue in aqua ammoniae,or fatigue in air,the cracks always initiate at the site subject to maximum normal stress(θ=-110°)along the notched surface,and then propagate along the maximum shear stress direction from that site(α=-35°).This indicates that normal stress component plays a dominant role in stress corrosion of this system,which is related to the anodic dissolution accelerated by normal stress component.

收稿日期: 1990-02-25

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引用本文:

王核力;褚武扬;肖纪美. 应力分量对黄铜Ⅱ型缺口试样应力腐蚀的影响[J]. 中国腐蚀与防护学报, 1990, 10(1): 51-58.
. THE EFFECT OF STRESS COMPONENTS ON STRESS CORROSION OF NOTCHED BRASS SPECIMENS UNDER MODE II LOADING. J Chin Soc Corr Pro, 1990, 10(1): 51-58.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1990/V10/I1/51

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