Compensation effect in creep of conventional polycrystalline alloy 718

The compensation effect has been observed in the creep of the conventional polycrystalline Alloy 718. The apparent creep activation energy Q sub app changes linearly with the logarithm of changing pre-exponential factor. The compensation temperature T sub c was found to be approx810 deg C, which is...

Full description

Saved in:
Bibliographic Details
Published in:Scripta materialia 2000-04, Vol.42 (9), p.917-922
Main Authors: Song, H.W., Guo, S.R., Lu, D.Z., Xu, Y., Wang, Y.L., Lin, D.L., Hu, Z.Q.
Format: Article
Language:English
Subjects:
Applied sciences
CHEMICAL COMPOSITION
Condensed matter: structure, mechanical and thermal properties
CREEP
Exact sciences and technology
GRAIN BOUNDARIES
INCONEL 718
MATERIALS SCIENCE
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
Physics
POLYCRYSTALS
SAMPLE PREPARATION
TEMPERATURE DEPENDENCE
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The compensation effect has been observed in the creep of the conventional polycrystalline Alloy 718. The apparent creep activation energy Q sub app changes linearly with the logarithm of changing pre-exponential factor. The compensation temperature T sub c was found to be approx810 deg C, which is very close to the critical temperature for fast gamma " to delta phase transition in Alloy 718. A creep equation, in which only one composition-dependent parameter, i.e. Q sub app , is involved, has been derived from the compensation law. The creep rates calculated according to this derived equation are in excellent agreement with the experimental data.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(00)00314-6