Self-annealing in a two-phase Pb-Sn alloy after processing by high-pressure torsion

Nian Xian Zhang, N. Chinh, Megumi Kawasaki, Yi Huang, Terence G. Langdon

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A Pb-62% Sn two-phase eutectic alloy was processed by high-pressure torsion (HPT) and stored at room temperature (RT) to investigate the occurrence of self-annealing. The microstructural characteristics and mechanical properties were recorded during self-annealing using scanning electron microscopy, tensile testing and nanoindentation. Processing by HPT produces a weakening effect but storage at RT leads to a gradual increase in the hardness together with significant grain growth. Nanoindentation tests were performed by applying both the indentation depth-time (h-t) relationship at the holding stage and the hardness, H, at various loading rates in order to explore the evolution of the strain rate sensitivity (SRS), m. The results obtained by tensile testing and nanoindentation are consistent despite the large difference in the volumes of the examined regions, thereby confirming the validity of using nanoindentation to measure the strain rate sensitivity.

Original languageEnglish
Pages (from-to)350-359
Number of pages10
JournalMaterials Science and Engineering A
Volume666
DOIs
Publication statusPublished - Jun 1 2016

Fingerprint

Nanoindentation
nanoindentation
Torsional stress
torsion
Annealing
annealing
Tensile testing
Processing
strain rate
Strain rate
hardness
Hardness
eutectic alloys
loading rate
room temperature
Grain growth
indentation
Indentation
Eutectics
mechanical properties

Keywords

  • High-pressure torsion
  • Indentation creep
  • Nanoindentation
  • Pb-Sn alloy
  • Strain rate sensitivity

ASJC Scopus subject areas

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

Cite this

Self-annealing in a two-phase Pb-Sn alloy after processing by high-pressure torsion. / Zhang, Nian Xian; Chinh, N.; Kawasaki, Megumi; Huang, Yi; Langdon, Terence G.

In: Materials Science and Engineering A, Vol. 666, 01.06.2016, p. 350-359.

Research output: Contribution to journalArticle

Zhang, Nian Xian ; Chinh, N. ; Kawasaki, Megumi ; Huang, Yi ; Langdon, Terence G. / Self-annealing in a two-phase Pb-Sn alloy after processing by high-pressure torsion. In: Materials Science and Engineering A. 2016 ; Vol. 666. pp. 350-359.
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