A Study of TMF Characteristics of Ni-base Superalloy IN738LC

被引：1

作者：

Lee, Dongkeun ^{[1
]}

Lee, Jeong-Min ^{[1
]}

Koo, Jae-Mean ^{[2
]}

Seok, Chang-sung ^{[2
]}

Kim, Jaewon ^{[3
]}

机构：

[1] Sungkyunkwan Univ, Grad Sch Mech Engn, Suwon, South Korea

[2] Sungkyunkwan Univ, Dept Mech Engn, Suwon, South Korea

[3] Suwon Sci Coll, Dept Automobile, Suwon, South Korea

来源：

ADVANCED MATERIALS, MECHANICS AND INDUSTRIAL ENGINEERING | 2014年 / 598卷

基金：

新加坡国家研究基金会;

关键词：

TMF(Thermo Mechanical Fatigue); IP(In-Phase); OP(Out-of-Phase); Superalloy; IN738LC; THERMOMECHANICAL FATIGUE;

D O I：

10.4028/www.scientific.net/AMM.598.28

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A gas turbine blade operates under severe conditions including high temperature, high speed rotation, and frequent starts and shutdowns. Under such operating conditions, a blade is exposed to a thermo mechanical fatigue environment. These conditions shorten the life of the turbine parts and reduce the reliability of the gas turbine. Therefore, research on the characteristics of blade material is necessary. In this study, thermo-mechanical fatigue (TMF) tests were conducted for IN738LC, which is base a material for turbine blades. Tests were conducted under both the IP (in-phase) and OP (out of-phase) conditions, and tests results were compared in terms of fatigue life. After obtaining the epsilon -N curves, additional TMF tests were conducted according to variations in fatigue life. The purpose of the TMF test is to observe the change in mechanical properties of materials damaged during TMF and how these relate to fatigue life. For this purpose, an indentation test was conducted and the relationship between hardness and fatigue life were obtained.

引用

页码：28 / 32

页数：5

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