Preliminary investigation of the kinetics of primary creep of a two phase gamma TiAl alloy

Journal Article · Mon Nov 01 00:00:00 EST 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90114-8· OSTI ID:5791034

Hayes, R W ^[1]

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1. Metals Technology Inc., Northridge, CA (United States)

It is the intent of this communication to present and discuss some data regarding the kinetics of primary creep of a two phase gamma TiAl alloy which had been studied previously to determine the mechanisms giving rise to the minimum strain rate. In order to study the kinetics of primary creep of the present gamma TiAl alloy an approach previously taken by Dorn et al and also recently employed by Argon and Bhattacharya was taken. Dorn et al demonstrated that at a given constant stress, the strain rate during primary creep is governed by a combined time-temperature parameter [Theta] = t exp([minus]Q/RT) where Q is the activation energy for self diffusion which many times also governs the process of steady-state creep. It was shown that at the same constant stress level all primary creep curves were found to collapse on one another when the primary creep strain is plotted as a function of [Theta][sup (9)].

• OSTI ID: 5791034
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 29:9; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CREEP
DISLOCATIONS
TITANIUM BASE ALLOYS
BINARY ALLOY SYSTEMS
PHASE STUDIES
STRAINS
STRESSES
ALLOY SYSTEMS
ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
LINE DEFECTS
MECHANICAL PROPERTIES
TITANIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies