Compressive properties of Ni2MnGa produced by Spark Plasma Sintering

Zheng Wang, Minoru Matsumoto, Toshihiko Abe, Katsunari Oikawa, Toshiyuki Takagi, Jinhao Qiu, Junji Tani

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Ni2MnGa alloys with relative density of 99.6% were obtained with a maximum pressure of 80 MPa and a maximum temperature of 1173 K applied in the Spark Plasma Sintering (SPS) process. Heat treatment was subsequently performed at 1073 K for 864 ks in vacuum with slow cooling. The martensitic transformation temperatures, Ms, Mf, As, Af, were determined as 235, 220, 239 and 254 K respectively. Mechanical property comparisons of sintered alloys to arc-melted alloys were experimentally investigated by compression tests at room temperature. Sintered alloys show compressive ductility of 24% strain with transgranular cracking while arc-melted alloys only have 8% strain and both intergranular cracking and transgranular cracking. Furthermore, the sintered alloys possess higher yield stress and fracture strength.

Original languageEnglish
Pages (from-to)863-866
Number of pages4
JournalMaterials Transactions, JIM
Volume40
Issue number9
DOIs
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Engineering(all)

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