Advanced

Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy : In-situ high-energy SAXS/WAXS investigation

Haas, Sylvio LU ; Andersson, Joel; Fisk, Martin LU ; Park, Jun Sang and Lienert, Ulrich (2018) In Materials Science and Engineering A 711. p.250-258
Abstract

The aim of this work is to characterize the precipitation kinetics in Haynes® 282® superalloys using in-situ high-energy Small Angle X-ray Scattering (SAXS) together with Wide Angle X-ray Scattering (WAXS). The phases identified by WAXS include γ (matrix), γ′ (hardening precipitates), MC (metallic carbides), and M23C6/M6C (secondary metallic carbides). The γ’-precipitates are spheroids with a diameter of several nanometres, depending on the temperature and ageing time. From the SAXS data, quantitative parameters such as volume fraction, number density and inter-particle distance were determined and correlated with ex-situ Vickers microhardness measurements. The strengthening components associated with... (More)

The aim of this work is to characterize the precipitation kinetics in Haynes® 282® superalloys using in-situ high-energy Small Angle X-ray Scattering (SAXS) together with Wide Angle X-ray Scattering (WAXS). The phases identified by WAXS include γ (matrix), γ′ (hardening precipitates), MC (metallic carbides), and M23C6/M6C (secondary metallic carbides). The γ’-precipitates are spheroids with a diameter of several nanometres, depending on the temperature and ageing time. From the SAXS data, quantitative parameters such as volume fraction, number density and inter-particle distance were determined and correlated with ex-situ Vickers microhardness measurements. The strengthening components associated with precipitates and solid solutions are differentiated using the measured Vickers microhardness and SAXS model parameters. A square root dependence between strengthening attributable to the precipitates and the product of volume fraction and mean precipitate radius is found. The solid solution strengthening component correlates with the total volume fraction of precipitates.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Characterization, Hardness, Nickel alloys, SAXS, WAXS, X-ray analysis
in
Materials Science and Engineering A
volume
711
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85034657372
ISSN
0921-5093
DOI
10.1016/j.msea.2017.11.035
language
English
LU publication?
yes
id
92964100-7e55-47d3-9fd6-d210ba45dfbd
date added to LUP
2017-12-07 11:11:29
date last changed
2017-12-13 15:10:19
@article{92964100-7e55-47d3-9fd6-d210ba45dfbd,
  abstract     = {<p>The aim of this work is to characterize the precipitation kinetics in Haynes® 282® superalloys using in-situ high-energy Small Angle X-ray Scattering (SAXS) together with Wide Angle X-ray Scattering (WAXS). The phases identified by WAXS include γ (matrix), γ′ (hardening precipitates), MC (metallic carbides), and M<sub>23</sub>C<sub>6</sub>/M<sub>6</sub>C (secondary metallic carbides). The γ’-precipitates are spheroids with a diameter of several nanometres, depending on the temperature and ageing time. From the SAXS data, quantitative parameters such as volume fraction, number density and inter-particle distance were determined and correlated with ex-situ Vickers microhardness measurements. The strengthening components associated with precipitates and solid solutions are differentiated using the measured Vickers microhardness and SAXS model parameters. A square root dependence between strengthening attributable to the precipitates and the product of volume fraction and mean precipitate radius is found. The solid solution strengthening component correlates with the total volume fraction of precipitates.</p>},
  author       = {Haas, Sylvio and Andersson, Joel and Fisk, Martin and Park, Jun Sang and Lienert, Ulrich},
  issn         = {0921-5093},
  keyword      = {Characterization,Hardness,Nickel alloys,SAXS,WAXS,X-ray analysis},
  language     = {eng},
  month        = {01},
  pages        = {250--258},
  publisher    = {Elsevier},
  series       = {Materials Science and Engineering A},
  title        = {Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy : In-situ high-energy SAXS/WAXS investigation},
  url          = {http://dx.doi.org/10.1016/j.msea.2017.11.035},
  volume       = {711},
  year         = {2018},
}