Influence of severe plastic deformation at cryogenic temperature on grain refinement and softening of pure metals: Investigation using high-pressure torsion

Kaveh Edalati, Jorge M. Cubero-Sesin, Ali Alhamidi, Mohamed Intan Fadhlina, Zenji Horita

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Several metals were severely deformed at cryogenic temperature in liquid nitrogen and at room temperatures in air using high-pressure torsion (HPT). Extra grain refinement to the nanometer level and extra hardening were achieved after cryogenic-HPT in niobium, which has a high melting temperature. In copper, which has a moderate melting temperature, nanograins formed during cryogenic-HPT but self-annealing, i.e., abnormal softening and grain coarsening to the micrometer level, occurred within a few hours after the cryogenic-HPT. In low-melting-temperature metals such as zinc, magnesium and aluminum, cryogenic-HPT led to extra softening and/or formation of coarser grains because of enhanced static recrystallization. The effect of impurities on grain size, hardness-strain behavior and self-annealing was also studied after cryogenic-HPT.

Original languageEnglish
Pages (from-to)103-110
Number of pages8
JournalMaterials Science and Engineering A
Volume613
DOIs
Publication statusPublished - 8 Sep 2014
Externally publishedYes

Fingerprint

Grain refinement
cryogenic temperature
softening
Torsional stress
Cryogenics
plastic deformation
torsion
Plastic deformation
Metals
cryogenics
metals
Melting point
melting
Temperature
Niobium
Annealing
annealing
Coarsening
Liquid nitrogen
Aluminum

Keywords

  • Homologous temperature
  • Liquid nitrogen
  • Self-annealing
  • Severe plastic deformation (SPD)
  • Stacking fault energy
  • Ultrafine-grained (UFG) materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Influence of severe plastic deformation at cryogenic temperature on grain refinement and softening of pure metals : Investigation using high-pressure torsion. / Edalati, Kaveh; Cubero-Sesin, Jorge M.; Alhamidi, Ali; Intan Fadhlina, Mohamed; Horita, Zenji.

In: Materials Science and Engineering A, Vol. 613, 08.09.2014, p. 103-110.

Research output: Contribution to journalArticle

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