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Physics of Metals and Metallography
Published in: Physics of Metals and Metallography 3/2020

01-03-2020 | STRENGTH AND PLASTICITY

The Role of η Phase on the Strength of A286 Superalloy with Different Ti/Al Ratios

Authors: M. Seifollahi, S. H. Razavi, Sh. Kheirandish, S. M. Abbasi

Published in: Physics of Metals and Metallography | Issue 3/2020

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Abstract

In this investigation, the relationship between η phase and Ti/Al ratios of A286 superalloy with its tensile properties was evaluated. Alloys with Ti/Al ratio of 3, 10, and 20 were overaged at 820°C for 2, 4, 8, and 16 h to achieve different morphologies and volume fractions of η phase. The η volume fraction increased with an increase of Ti/Al ratio and its morphology changed from cellular to widmanschtäten. The cellular η phase enhanced the room temperature tensile strength of the superalloy by providing a barrier to grain boundary sliding. The increasing rate of strength was related to η-phase morphology. For the alloy with Ti/Al of 10, this rate was more than that of the alloy with ratio of 20, as a result of precipitation the widmanschtäten η.The η phase deteriorated the high temperature tensile strength, which can be attributed to lowering the matrix strength.
previous article Structure and Deformation Properties of Austenitic Stainless Steel
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Metadata
Title
The Role of η Phase on the Strength of A286 Superalloy with Different Ti/Al Ratios
Authors
M. Seifollahi
S. H. Razavi
Sh. Kheirandish
S. M. Abbasi
Publication date
01-03-2020
Publisher
Pleiades Publishing
Published in
Physics of Metals and Metallography / Issue 3/2020
Print ISSN: 0031-918X
Electronic ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X20030059

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