Premium
Microstructural modelling of the creep behaviour of particle‐strengthened superalloys
Author(s) -
Reppich Bernd,
Heilmaier Martin,
Liebig Karin,
Schumann Gerhard,
Stein KlausDieter,
Woller Thomas
Publication year - 1990
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199000343
Subject(s) - nimonic , creep , superalloy , materials science , metallurgy , hardening (computing) , particle (ecology) , stress (linguistics) , precipitation hardening , matrix (chemical analysis) , exponent , thermodynamics , composite material , microstructure , physics , geology , linguistics , oceanography , philosophy , layer (electronics)
The steady‐state creep of particle‐strengthened systems is predicted from the matrix behaviour within the framework of the threshold stress concept. A procedure is outlined for estimation of the hardening parameter σ p reflecting the effect of the particles. Unlike previous suggestions neither questionable nor restrictive simplifications are assumed for σ p and the stress exponent n m of the particle‐free matrix. The proposed approach is exemplified with γ’ precipitation‐strengthened Ni‐based superalloy Nimonic PE 16 crept at 810°C. The matrix creep data and, in particular, the needed n m ‐values are measured on single‐phase Nichrome reference alloys.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom