Compressive properties of Ni2MnGa produced by Spark Plasma Sintering

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

doi:10.2320/matertrans1989.40.863

Compressive properties of Ni₂MnGa produced by Spark Plasma Sintering

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

Tohoku University

Research output: Contribution to journal › Article › peer-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, M_s, M_f, A_s, A_f, 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 language	English
Pages (from-to)	863-866
Number of pages	4
Journal	materials transactions, jim
Volume	40
Issue number	9
DOIs	https://doi.org/10.2320/matertrans1989.40.863
Publication status	Published - 1999

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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.",

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T1 - Compressive properties of Ni2MnGa produced by Spark Plasma Sintering

AU - Wang, Zheng

AU - Matsumoto, Minoru

AU - Abe, Toshihiko

AU - Oikawa, Katsunari

AU - Takagi, Toshiyuki

AU - Qiu, Jinhao

AU - Tani, Junji

PY - 1999

Y1 - 1999

N2 - 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.

AB - 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.

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Compressive properties of Ni₂MnGa produced by Spark Plasma Sintering

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