Creep Behaviour of Modified Mar-247 Superalloy

Archives of Metallurgy and Materials

M. Cieśla¹  F. Binczyk¹  M. Mańka¹  P. Gradoń¹ 

[1] SILESIAN UNIVERSITY OF TECHNOLOGY, 8 KRASI?SKIEGO STR., 40-018 KATOWICE, POLAND

关键词: Keywords: nickel superalloys;    creep;    macrostructure;    microstructure;   

DOI  :  10.1515/amm-2016-0119

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The paper presents the results of analysis of creep behaviour in short term creep tests of cast MAR-247 nickel-based superalloy samples made using various modification techniques and heat treatment. The accelerated creep tests were performed under temperature of 982 °C and the axial stresses of σ = 150 MPa (variant I) and 200 MPa (variant II). The creep behaviour was analysed based on: creep durability (creep rupture life), steady-state creep rate and morphological parameters of macro- and microstructure. It was observed that the grain size determines the creep durability in case of test conditions used in variant I, durability of coarse-grained samples was significantly higher.

【 授权许可】

Unknown