Precipitation behavior of Alloy 625 and Alloy 625 plus
Creators
- 1. Department of Material Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI, 48109 (United States)
Description
Alloy 625 is a commercial Ni-based superalloy commonly used in power generation applications. Its limited aging hardenability led to the design of Alloy 625 Plus through slight alloying modifications. However the differences in aging behavior between Alloy 625 and Alloy 625 Plus are not documented. Here, the precipitation behavior of Alloy 625 and Alloy 625 Plus after thermal aging at 650 °C up to 1000 h were quantitatively compared. Despite compositional similarities, Alloy 625 Plus exhibited both γ″ and γ′ precipitation while the γ″ phase formed in Alloy 625. Alloy 625 Plus exhibited higher number density and volume fraction and a slower coarsening rate of γ″ precipitates. These precipitation differences may be associated with the larger Nb and Ti supersaturation and partition coefficients in Alloy 625 Plus as compared to Alloy 625.
Additional details
Identifiers
- DOI
- 10.1016/j.jallcom.2019.151916;
- PII
- S0925838819331561;
Publishing Information
- Journal Title
- Journal of Alloys and Compounds
- Journal Volume
- 811
- Journal Page Range
- vp.
- ISSN
- 0925-8388
- CODEN
- JALCEU
INIS
- Country of Publication
- Switzerland
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 55047122
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AGING; DESIGN; HEAT RESISTING ALLOYS; POWER GENERATION; PRECIPITATION; SUPERSATURATION
- Descriptors DEC
- ALLOYS; HEAT RESISTANT MATERIALS; MATERIALS; SATURATION; SEPARATION PROCESSES
Optional Information
- Copyright
- Copyright (c) 2019 Elsevier B.V. All rights reserved.