Ultrafine spherulite Mg alloy with high yield strength

Masafumi Matsushita, Kohtaro Masuda, Ryohei Waki, Hiroaki Ohfuji, Michiaki Yamasaki, Yoshihito Kawamura, Yuji Higo

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Under high-temperature and high-pressure conditions, the long-period stacking-ordered structure in Mg85Y9Zn6 transforms to a dual-phase structure consisting of a hexagonal close-packed lattice and a face-centered cubic lattice. After further solidification at high-pressure, unique ultrafine microstructures are formed. The alloy recovered after subjected at 10 GPa and 973 K exhibited a fine lamella structure, and a 0.2% proof stress (σ0.2) of 480 MPa obtained by the compression test. Further the alloy recovered after subjected at 10 GPa and 1273 K, a unique spherulite structure were formed, and its σ0.2 improved to 780 MPa.

Original languageEnglish
Pages (from-to)1284-1289
Number of pages6
JournalJournal of Alloys and Compounds
Volume784
DOIs
Publication statusPublished - 2019 May 5
Externally publishedYes

Keywords

  • High pressure synthesis
  • Mg alloy
  • Spherulite
  • Yield strength

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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