Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effect of Grain Size on the Susceptibility towards Strain Age Cracking in the Precipitation Hardening Nickel-Based Superalloy Haynes® 282®
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
2019 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

With increasing the demand for higher efficiency of aircraft engines, a material which can withstand higher temperature is needed, together with good weldability, creep, and corrosion resistance. Alloy 718 has been the standard grade for several years, it provides high strength at elevated temperature. This alloy has good fabrication capability due to sluggish precipitation kinetics of its hardening phase gamma prime double prime. On the other hand temperature stability can be increased by using superalloys that are precipitation hardened by the gamma prime phase.

Haynes 282 is newly developed gamma prime precipitation hardening superalloy, which has 150°C higher temperature stability than Alloy 718. Rapid hardening of gamma prime phase can increase the susceptibility toward stain age cracking (SAC). This cracking phenomenon occurs during post weld heat treatment when residual stress relaxation coincides with the precipitation of hardening phases. Apart from rapid precipitation kinetics other factors also influence SAC resistance such as chemical composition, Al+Ti content, microstructure and grain size.

This work sets focus on grain size effects on SAC susceptibility in Haynes 282. Large grain size was found to have a positive effect on ductility when compared to mill annealed material.

Place, publisher, year, edition, pages
2019. , p. 43
Keywords [en]
Ni-based superalloys, strain age cracking
Keywords [sv]
Nickelbaserade superlegeringar, sprickbildning
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
URN: urn:nbn:se:hv:diva-14658Local ID: EXP800OAI: oai:DiVA.org:hv-14658DiVA, id: diva2:1366509
Subject / course
Mechanical engineering
Educational program
Produktionsteknik, magister
Supervisors
Examiners
Available from: 2019-11-18 Created: 2019-10-29 Last updated: 2019-11-18Bibliographically approved

Open Access in DiVA

No full text in DiVA

By organisation
Division of Subtractive and Additive Manufacturing
Production Engineering, Human Work Science and Ergonomics

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 34 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf