Hot Powder Vehicle Compaction of an Atomized Stainless Steel Powder

Ryuzo Watanabe, Akira Kawasaki, Masafumi Miyajima

Research output: Contribution to journalArticle

Abstract

Densification and microstructural development of stainless steel powder during hot powder vehicle compaction was investigated. The preheated powder preform, vacuum encapsuled in a borosilicate glass, was compacted in a steel die using preheated alumina granules as a pressure transmitting medium. The condition for the full densification was determined as a function of pressure and temperature. Three microstructural features were observed during the compacting process; solutioning of dendritic structure, recrystallization and normal grain growth, each of which was found to be mainly dependent on preheating temperature. It has been found that a submicron-sized microstructure is formed during the recrystallization stage. Kinetic analysis showed that plastic flow is a dominant mechanism of densification of the present compaction process.

Original languageEnglish
Pages (from-to)152-157
Number of pages6
JournalMaterials Transactions, JIM
Volume31
Issue number2
DOIs
Publication statusPublished - 1990 Jan 1

Keywords

  • full-densification
  • hot powder vehicle compaction
  • plastic deformation
  • stainless steel powder
  • submicron-sized microstructure

ASJC Scopus subject areas

  • Engineering(all)

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