Chlorine-Induced Stress Corrosion Cracking of Single Crystal Superalloys at 550 °C

IF 2.1 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Oxidation of Metals Pub Date : 2024-08-05 DOI:10.1007/s11085-024-10282-7

F. Duarte Martinez, Karl Dawson, Gordon Tatlock, J. Leggett, G. Gibson, J. C. Mason-Flucke, J. R. Nicholls, A. Syed, N. Morar, S. Gray

引用次数: 0

Abstract

This study has investigated the effect of NaCl and different gaseous environments on the stress corrosion cracking susceptibility of CMSX-4 at 550 °C. The presence of SO_x leads to the rapid dissociation of NaCl into Na₂SO₄ and the release Cl₂ and HCl, which then trigger an active oxidation mechanism and stress corrosion cracking. The incubation time for crack initiation at 690 MPa and in the presence of a sulphur containing environment is 10 min. A working hypothesis is that stress corrosion cracking occurs due to the hydrogen released at the oxide/alloy interface when metal chlorides are formed; however, this hypothesis needs to be further explored.

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单晶超合金在 550 ℃ 下的氯应力腐蚀开裂

本研究探讨了 NaCl 和不同气体环境对 550 °C 下 CMSX-4 应力腐蚀开裂敏感性的影响。SOx 的存在导致 NaCl 快速解离成 Na2SO4，并释放出 Cl2 和 HCl，进而引发活跃的氧化机制和应力腐蚀开裂。在 690 兆帕斯卡的压力和含硫环境下，裂纹产生的潜伏时间为 10 分钟。一个可行的假设是，当金属氯化物形成时，氧化物/合金界面释放的氢会导致应力腐蚀开裂；但这一假设还需要进一步探讨。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Oxidation of Metals 工程技术-冶金工程

CiteScore

5.10

自引率

9.10%

发文量

审稿时长

2.2 months

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