Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy

R. Casas, F. Galvez, M. Campos, David C Dunand, David N Seidman

Research output: Contribution to conferencePaper

Abstract

Given the importance of nickel-base superalloys, there is interest in developing new cobalt-based superalloys with a dual phase (face-centered cubic)/'-Co3(Al,W) (L12) microstructure. Novel Co-based superalloys with this dual microstructure, have been developed by powder metallurgy (PM) techniques in our research. Starting from two particular compositions, Co-12Al-10W at.% and Co-12Al-10W-2Ti-2Ta at.%, processed by mechanical alloying (MA) alloys have been consolidated utilizing field-assisted hot pressing (FAHP). Our research is focused on the effects of specific heat treatments on the final microstructure. The results are linked to the final '-Co3(Al,W) (L12) volume-fraction, which depends on the temperature and times employed during both steps of the heat treatments. Microhardness measurements of both compositions demonstrate that Ti- and Ta-additions increase the microhardness values of the Co alloy. This quinary alloy also exhibits an increase of the '-Co3(Al,W) (L12) volume-fraction on the final samples.

Original languageEnglish (US)
StatePublished - Jan 1 2017
EventInternational Powder Metallurgy Congress and Exhibition, Euro PM 2017 - Milan, Italy
Duration: Oct 1 2017Oct 4 2017

Other

OtherInternational Powder Metallurgy Congress and Exhibition, Euro PM 2017
CountryItaly
CityMilan
Period10/1/1710/4/17

Fingerprint

powder metallurgy
Strengthening (metal)
heat resistant alloys
Powder metallurgy
Cobalt
Superalloys
heat treatment
cobalt
Heat treatment
Microhardness
microhardness
microstructure
Microstructure
Volume fraction
hot pressing
Mechanical alloying
Hot pressing
Nickel
Chemical analysis
alloying

Keywords

  • Ageing
  • Cobalt-base superalloys
  • Solubilization
  • Ti- Ta- alloying elements

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Surfaces and Interfaces

Cite this

Casas, R., Galvez, F., Campos, M., Dunand, D. C., & Seidman, D. N. (2017). Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy. Paper presented at International Powder Metallurgy Congress and Exhibition, Euro PM 2017, Milan, Italy.
Casas, R. ; Galvez, F. ; Campos, M. ; Dunand, David C ; Seidman, David N. / Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy. Paper presented at International Powder Metallurgy Congress and Exhibition, Euro PM 2017, Milan, Italy.
@conference{bf2046b2268a4a8bb4602eca823c6832,
title = "Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy",
abstract = "Given the importance of nickel-base superalloys, there is interest in developing new cobalt-based superalloys with a dual phase (face-centered cubic)/'-Co3(Al,W) (L12) microstructure. Novel Co-based superalloys with this dual microstructure, have been developed by powder metallurgy (PM) techniques in our research. Starting from two particular compositions, Co-12Al-10W at.{\%} and Co-12Al-10W-2Ti-2Ta at.{\%}, processed by mechanical alloying (MA) alloys have been consolidated utilizing field-assisted hot pressing (FAHP). Our research is focused on the effects of specific heat treatments on the final microstructure. The results are linked to the final '-Co3(Al,W) (L12) volume-fraction, which depends on the temperature and times employed during both steps of the heat treatments. Microhardness measurements of both compositions demonstrate that Ti- and Ta-additions increase the microhardness values of the Co alloy. This quinary alloy also exhibits an increase of the '-Co3(Al,W) (L12) volume-fraction on the final samples.",
keywords = "Ageing, Cobalt-base superalloys, Solubilization, Ti- Ta- alloying elements",
author = "R. Casas and F. Galvez and M. Campos and Dunand, {David C} and Seidman, {David N}",
year = "2017",
month = "1",
day = "1",
language = "English (US)",
note = "International Powder Metallurgy Congress and Exhibition, Euro PM 2017 ; Conference date: 01-10-2017 Through 04-10-2017",

}

Casas, R, Galvez, F, Campos, M, Dunand, DC & Seidman, DN 2017, 'Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy' Paper presented at International Powder Metallurgy Congress and Exhibition, Euro PM 2017, Milan, Italy, 10/1/17 - 10/4/17, .

Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy. / Casas, R.; Galvez, F.; Campos, M.; Dunand, David C; Seidman, David N.

2017. Paper presented at International Powder Metallurgy Congress and Exhibition, Euro PM 2017, Milan, Italy.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy

AU - Casas, R.

AU - Galvez, F.

AU - Campos, M.

AU - Dunand, David C

AU - Seidman, David N

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Given the importance of nickel-base superalloys, there is interest in developing new cobalt-based superalloys with a dual phase (face-centered cubic)/'-Co3(Al,W) (L12) microstructure. Novel Co-based superalloys with this dual microstructure, have been developed by powder metallurgy (PM) techniques in our research. Starting from two particular compositions, Co-12Al-10W at.% and Co-12Al-10W-2Ti-2Ta at.%, processed by mechanical alloying (MA) alloys have been consolidated utilizing field-assisted hot pressing (FAHP). Our research is focused on the effects of specific heat treatments on the final microstructure. The results are linked to the final '-Co3(Al,W) (L12) volume-fraction, which depends on the temperature and times employed during both steps of the heat treatments. Microhardness measurements of both compositions demonstrate that Ti- and Ta-additions increase the microhardness values of the Co alloy. This quinary alloy also exhibits an increase of the '-Co3(Al,W) (L12) volume-fraction on the final samples.

AB - Given the importance of nickel-base superalloys, there is interest in developing new cobalt-based superalloys with a dual phase (face-centered cubic)/'-Co3(Al,W) (L12) microstructure. Novel Co-based superalloys with this dual microstructure, have been developed by powder metallurgy (PM) techniques in our research. Starting from two particular compositions, Co-12Al-10W at.% and Co-12Al-10W-2Ti-2Ta at.%, processed by mechanical alloying (MA) alloys have been consolidated utilizing field-assisted hot pressing (FAHP). Our research is focused on the effects of specific heat treatments on the final microstructure. The results are linked to the final '-Co3(Al,W) (L12) volume-fraction, which depends on the temperature and times employed during both steps of the heat treatments. Microhardness measurements of both compositions demonstrate that Ti- and Ta-additions increase the microhardness values of the Co alloy. This quinary alloy also exhibits an increase of the '-Co3(Al,W) (L12) volume-fraction on the final samples.

KW - Ageing

KW - Cobalt-base superalloys

KW - Solubilization

KW - Ti- Ta- alloying elements

UR - http://www.scopus.com/inward/record.url?scp=85056562464&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056562464&partnerID=8YFLogxK

M3 - Paper

ER -

Casas R, Galvez F, Campos M, Dunand DC, Seidman DN. Effect of heat treatments on /' microstructures and strengthening in cobalt-base superalloys created by powder metallurgy. 2017. Paper presented at International Powder Metallurgy Congress and Exhibition, Euro PM 2017, Milan, Italy.