Corrosion-fatigue testing of Ni-based superalloy RR1000

被引：14
|
作者：
Child, D. J. [1 ]
Meldrum, J. [2 ]
Onwuarolu, P. [2 ]
机构：
[1] Rolls Royce Plc, POB 31, Derby DE24 8BJ, England
[2] Amec Foster Wheeler, Birchwood Pk, Warrington WA3 6GA, Cheshire, England
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2017年 / 33卷 / 09期
基金：
英国工程与自然科学研究理事会;
关键词：
Corrosion; Corrosion-fatigue; Ni-based superalloy; Pitting; Salt; NICKEL-BASED SUPERALLOY; HOT CORROSION; OXIDATION BEHAVIOR; DEGREES-C; STAINLESS-STEELS; HAYNES; 230; ALLOY; TEMPERATURES; STRESS; MECHANISM;
D O I：
10.1080/02670836.2016.1242827
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Operation of gas turbines at high temperatures can lead to corrosion of turbine materials. A programme was designed to understand the corrosion-fatigue behaviour of two grain size variants of RR1000 under cyclic loading at elevated. Tests were conducted on cylindrical specimens under a range of loading conditions. Results indicated that salted specimens tested in air-SOx had shorter fatigue lives than unsalted specimens tested in air, and this deficit was dependent on stress and/or test duration. Examination of specimens showed that the extent of corrosion was dependent on exposure time and stress. Additional salt loading resulted in faster initial pit growth which led to lower fatigue lives at higher stresses.
引用
收藏
页码：1040 / 1047
页数：8
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