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首页> 外文会议>Corrosion Prevention Conference >TOWARDS AN UNDERSTANDING OF THE OCCURRENCE OF ATMOSPHERIC CHLORIDE-INDUCED STRESS CORROSION CRACKING IN TYPES 304L AND 316L AUSTENITIC STAINLESS STEELS
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TOWARDS AN UNDERSTANDING OF THE OCCURRENCE OF ATMOSPHERIC CHLORIDE-INDUCED STRESS CORROSION CRACKING IN TYPES 304L AND 316L AUSTENITIC STAINLESS STEELS

机译：朝着304L和316L奥氏体不锈钢（316L奥氏体不锈钢（316L奥氏体不锈钢）中的大气氯化物诱导应力腐蚀裂解的发生

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摘要

The occurrence of atmospheric chloride-induced stress corrosion cracking (AISCC) in types 304L and 316L austenitic stainless steels has been investigated under controlled conditions of tensile stress, chloride-salt deposition density (μg cm~(-2) of MgCl_2), temperature and relative humidity. Tensile specimens fashioned from 304L exhibited severe attack with several sensitized specimens undergoing complete failure in a matter of days. However, similar specimens of 316L showed no evidence of AISCC or, for that matter, any trace of localized corrosion throughout the test period of 600 hours; although a U-bend specimen of this latter material did undergo cracking. Cracks in all cases were predominantly trans-granular in nature, appeared to be associated with sites of localized corrosion and to propagate in the direction of the <111> crystallographic planes.
机译：在拉伸应力，氯化物沉积密度（μgcm〜（-2）的温度和mc），温度和型），温度和 相对湿度。 从304L塑造的拉伸标本表现出严重的攻击，几天内遭受了几个敏感的标本。 然而，类似的316L标本显示出AISCC的证据，或者，对于该事宜，在600小时的测试期间任何局部腐蚀的任何痕迹; 虽然这种后一种材料的U形弯曲标本确实经过裂缝。 所有病例中的裂缝主要在于颗粒于本质上，似乎与局部腐蚀的部位相关，并且在<111>晶体的方向上传播。

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