Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Hot Deformation Behaviour and Processing Map of Cast Alloy 825
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.ORCID-id: 0000-0003-0381-5494
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer. (Powder metallurgy)ORCID-id: 0000-0002-6339-4612
AB Sandvik Materials Technology.
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer.ORCID-id: 0000-0001-9775-0382
2021 (engelsk)Inngår i: Journal of materials engineering and performance (Print), ISSN 1059-9495, E-ISSN 1544-1024Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Alloy 825 is a nickel-based alloy that is commonly used in applications where both high strength and corrosion resistance are required, such as tanks in the chemical, food and petrochemical industries and oil and gas pipelines. Components made from Alloy 825 are often manufactured using hot deformation. However, there is no systematic study to optimise the processing conditions reported in literature. In this study, a processing map for as-cast Alloy 825 is established to maximise the power dissipation efficiency of hot deformation in the temperature range of 950 to 1250 °C at an interval of 50 °C and strain rate range of 0.01s−1 to 10.0s−1 to a true strain of 0.7 using a Gleeble-3500 thermomechanical simulator. The processing conditions are also correlated to the Vickers hardness of the final material, which is also characterised using optical microscopy and scanning electron microscopy, including electron backscattered diffraction. The true stress-true strain curves exhibit peak stresses followed by softening due to occurrence of dynamic recrystallization. The activation energy for plastic flow in the temperature range tested is approximately 450 kJ mol−1, and the value of the stress exponent in the (hyperbolic sine-based) constitutive equation, n=5.0, suggests that the rate-limiting mechanism of deformation is dislocation climb. Increasing deformation temperature led to a lower Vickers hardness in the deformed material, due to increased dynamic recrystallization. Raising the strain rate led to an increase in Vickers hardness in the deformed material due to increased work hardening. The maximum power dissipation efficiency is over 35%, obtained for deformation in the temperature range 1100-1250 °C and a strain rate of 0.01s−1-0.1s−1. These are the optimum conditions for hot working.

sted, utgiver, år, opplag, sider
Springer Nature , 2021.
Emneord [en]
Alloy 825; Activation energy; Dynamically recrystallised; Grain size; Hot deformation; Stress-strain curve
HSV kategori
Forskningsprogram
Teknisk materialvetenskap
Identifikatorer
URN: urn:nbn:se:kth:diva-301146DOI: 10.1007/s11665-021-05957-0ISI: 000664426000003Scopus ID: 2-s2.0-85108603380OAI: oai:DiVA.org:kth-301146DiVA, id: diva2:1591051
Merknad

QC 20210906

Tilgjengelig fra: 2021-09-05 Laget: 2021-09-05 Sist oppdatert: 2022-06-25bibliografisk kontrollert

Open Access i DiVA

fulltext(2055 kB)263 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 2055 kBChecksum SHA-512
886162386e80aa0aeaaafa3c35b77451b3b2ca410a1d4637e0d5ed511a9edaed99b156f851abc324d41688c4591aa40e300245a5bd7e6478edb5c4794302a7af
Type fulltextMimetype application/pdf

Andre lenker

Forlagets fulltekstScopushttps://link.springer.com/article/10.1007/s11665-021-05957-0#citeas

Person

Al-Saadi, MunirHulme-Smith, ChristopherJönsson, Pär

Søk i DiVA

Av forfatter/redaktør
Al-Saadi, MunirHulme-Smith, ChristopherJönsson, Pär
Av organisasjonen
I samme tidsskrift
Journal of materials engineering and performance (Print)

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 263 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 195 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf