Effect of high-pressure torsion on hydrogen trapping in Fe-0.01 mass% C and type 310S austenitic stainless steel

Yoji Mine, Zenji Horita, Yukitaka Murakami

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The effect of high-pressure torsion (HPT) on hydrogen trapping in Fe-0.01 mass% C and type 310S stainless steel was studied by metallographic characterization and hydrogen measurement after hydrogen gas charging. Hardening of both materials after processing by HPT was achieved through grain refinement. Hydrogen trapping in the Fe-0.01 mass% C was significantly increased by HPT processing, because of high binding energies of hydrogen with lattice defects such as dislocations and grain boundaries in body-centred cubic iron. In the type 310S processed by HPT, the hydrogen content that trapped by dislocations was less than that dissolved within the lattice and the contribution of grain boundaries on hydrogen trapping can be neglected. In the stable austenitic stainless steel processed by HPT, decreasing the dislocation density can reduce the trapped hydrogen to the solution-treated level while the hardening by grain refinement is retained.

Original languageEnglish
Pages (from-to)649-657
Number of pages9
JournalActa Materialia
Volume58
Issue number2
DOIs
Publication statusPublished - Jan 1 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Effect of high-pressure torsion on hydrogen trapping in Fe-0.01 mass% C and type 310S austenitic stainless steel'. Together they form a unique fingerprint.

  • Cite this