Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion

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@article{e73e2e1bea504159ac28dc72f8ed111a,
title = "Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion",
abstract = "Increasingly, metal parts made by additive manufacturing are produced using powder bed fusion (PBF). In this paper we report upon the combined effects of PBF parameters, including power and scan speed, in layer-by-layer manufacturing of gas atomized non-modulated (NM) Ni-Mn-Ga alloy. The effects of process parameters upon PBF is studied by applying nine different parameter sets in the as-printed state and after homogenization and ordering. The chemical composition of the samples is analyzed using EDX attached to an SEM, and the crystal structures are determined by X-ray diffraction. The phase transformation temperatures are measured using a low-field ac susceptibility measurement system and the magnetic properties are measured with a vibrating sample magnetometer (VSM). Before the heat-treatment, all as-printed samples showed paramagnetic behavior with low magnetization and no phase transformations could be observed in the susceptibility measurements. After annealing, the samples recovered the ferromagnetic behavior with comparable magnetization to annealed gas atomized powder. The as-printed samples were composed of a mixture of different crystal structures. However, after annealing the original NM structure with a = b = 5.47 {\AA} and c = 6.66 {\AA} with a c/a -ratio of 1.22 was recovered and crystallographic twins could be observed in an SEM.",
keywords = "Direct laser sintering, Laser melting, Additive manufacturing, Magnetic shape memory materials, Magnetic properties",
author = "Frans Nils{\'e}n and {Flores Ituarte}, Inigo and Mika Salmi and Jouni Partanen and Simo-Pekka Hannula",
year = "2019",
month = "8",
day = "1",
doi = "10.1016/j.addma.2019.05.029",
language = "English",
volume = "28",
pages = "464--474",
journal = "Additive Manufacturing",
issn = "2214-8604",
publisher = "Elsevier BV",

}

RIS - Lataa

TY - JOUR

T1 - Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion

AU - Nilsén, Frans

AU - Flores Ituarte, Inigo

AU - Salmi, Mika

AU - Partanen, Jouni

AU - Hannula, Simo-Pekka

PY - 2019/8/1

Y1 - 2019/8/1

N2 - Increasingly, metal parts made by additive manufacturing are produced using powder bed fusion (PBF). In this paper we report upon the combined effects of PBF parameters, including power and scan speed, in layer-by-layer manufacturing of gas atomized non-modulated (NM) Ni-Mn-Ga alloy. The effects of process parameters upon PBF is studied by applying nine different parameter sets in the as-printed state and after homogenization and ordering. The chemical composition of the samples is analyzed using EDX attached to an SEM, and the crystal structures are determined by X-ray diffraction. The phase transformation temperatures are measured using a low-field ac susceptibility measurement system and the magnetic properties are measured with a vibrating sample magnetometer (VSM). Before the heat-treatment, all as-printed samples showed paramagnetic behavior with low magnetization and no phase transformations could be observed in the susceptibility measurements. After annealing, the samples recovered the ferromagnetic behavior with comparable magnetization to annealed gas atomized powder. The as-printed samples were composed of a mixture of different crystal structures. However, after annealing the original NM structure with a = b = 5.47 Å and c = 6.66 Å with a c/a -ratio of 1.22 was recovered and crystallographic twins could be observed in an SEM.

AB - Increasingly, metal parts made by additive manufacturing are produced using powder bed fusion (PBF). In this paper we report upon the combined effects of PBF parameters, including power and scan speed, in layer-by-layer manufacturing of gas atomized non-modulated (NM) Ni-Mn-Ga alloy. The effects of process parameters upon PBF is studied by applying nine different parameter sets in the as-printed state and after homogenization and ordering. The chemical composition of the samples is analyzed using EDX attached to an SEM, and the crystal structures are determined by X-ray diffraction. The phase transformation temperatures are measured using a low-field ac susceptibility measurement system and the magnetic properties are measured with a vibrating sample magnetometer (VSM). Before the heat-treatment, all as-printed samples showed paramagnetic behavior with low magnetization and no phase transformations could be observed in the susceptibility measurements. After annealing, the samples recovered the ferromagnetic behavior with comparable magnetization to annealed gas atomized powder. The as-printed samples were composed of a mixture of different crystal structures. However, after annealing the original NM structure with a = b = 5.47 Å and c = 6.66 Å with a c/a -ratio of 1.22 was recovered and crystallographic twins could be observed in an SEM.

KW - Direct laser sintering

KW - Laser melting

KW - Additive manufacturing

KW - Magnetic shape memory materials

KW - Magnetic properties

UR - http://www.scopus.com/inward/record.url?scp=85066251569&partnerID=8YFLogxK

U2 - 10.1016/j.addma.2019.05.029

DO - 10.1016/j.addma.2019.05.029

M3 - Article

VL - 28

SP - 464

EP - 474

JO - Additive Manufacturing

JF - Additive Manufacturing

SN - 2214-8604

ER -

ID: 34203573