Microstructural evolution and magnetic properties of binder jet additive manufactured Ni-Mn-Ga magnetic shape memory alloy foam

Mostafaei, Amir; Kimes, Katerina; Stevens, Erica; Toman, Jakub; Krimer, Y.; Ullakko, K.; Chmielus, Markus

doi:10.1016/j.actamat.2017.04.010

Cited by 127 publications

(51 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4b show that the chemical composition has been maintained to a large extent and the average Mn evaporation is about 1.6% with a standard deviation of 0.005 in relation to the initial Mn at.% of 31.21. This is promising, as previously manufactured AM samples [27,30,32] have shown that the fast heating and cooling in the AM processes can lead to dendrite growth and chemical inhomogeneity. The chemical composition Table 2 Chemical composition of the as-printed and the heat-treated samples measured with EDX, with the standard deviation used as the error, and Archimedes density measurement results of the samples as-printed and after further heat-treatment.…”

Section: Resultsmentioning

confidence: 93%

“…As AM manufacturing methods have become more familiar, several attempts to use AM to manufacture Ni-Mn-Ga structures [27][28][29][30][31][32][33] and in other magnetocaloric materials [34] have been made. Additionally, the interaction of laser beam and Ni-Mn-Ga has been studied [35,36].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the interaction of laser beam and Ni-Mn-Ga has been studied [35,36]. The AM methods that have so far been utilized with MSM have been binder jet printing [27,28,31], direct metal deposition [30,32] or a combination of both methods in the use of elemental inks [29]. So far it has been proved that complex shapes can be produced [29,31,33] using additive manufacturing methods.…”

Section: Introductionmentioning

confidence: 99%

“…The diffusion of carbon during removal of binder can lead to carbon or oxygen contamination, which is detrimental [37,38] to Ni-Mn-Ga. In many of the previously reported articles the manufacturing process has additionally led to formation of dendritic structures [30,32] and some compositional inhomogeneity [27,32]. Thus, the aim of this paper is to study whether Ni-Mn-Ga structures can be manufactured using the PBF process without changing the chemical composition of the alloy or creating a dendritic structure.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Nilsén

Ituarte

Salmi

et al. 2019

Additive Manufacturing

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Nilsén

Ituarte

Salmi

et al. 2019

Additive Manufacturing

View full text Add to dashboard Cite

show abstract

“…DSC has a wide spectrum of applications ranging from simple heat of fusion evaluation() to advanced material microstructural evolution analyses and complex chemical reaction process identification . The versatility of the DSC is vast and researchers apply it to assess: coal,() cjceass,() waste,() catalysts,() minerals,() cement,() ceramics,() alloys,() and polymers.…”

Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: Differential scanning calorimetry—DSC

et al. 2018

View full text Add to dashboard Cite

Differential calorimetry assesses energy flow between a sample and its environment. The sample may be heated at a known heating rate (either constant or temperature modulated), or held in an isothermal environment or adiabatic environment depending on instrument and experimental design. The subset of differential calorimetry that deals with known heating or cooling rates is termed differential scanning calorimetry (DSC) and is a foundational technique to modern thermodynamics. It reports the heat flow versus temperature or time from which we calculate specific heat capacity at constant pressure, c P , enthalpy of fusion, and the heat of reaction. Moreover, it identifies how microstuctural properties evolve and thermal arrests-a characteristic of phase transitions. Heat-flux DSCs measure the temperature difference between a reference and a sample that sit on a thin two-dimensional plate. Power compensated DSCs heat reference material and the sample in independent furnaces while maintaining each at the same temperature. The Tian-Calvet DSC is similar to the heat-flux DSC, but minimizes error induced at high temperature with ring shaped thermopiles that surround the reference and the sample and in most designs incorporate the independent furnaces characteristic of heat flux DSC (three-dimensional heat flow probe). Convection and radiation energy leaks compromise accuracy above 600 • C, particularly for pan-style heat flux and power-compensated DSC, which are sensitive to heat transfer by conduction only. The Tian-Calvet DSC maximizes the signal-to-noise ratio by enveloping the sample and reference in the thermopile. Web of Science indexed 11 800 articles in 2016 and 2017 that mentioned DSC and assigned 789 to chemical engineering, which ranks it 5th after polymer science, material science, physical chemistry, and multi-disciplinary chemistry. A bibliometric analysis recognizes four research clusters: polymers and nano-composites, alloys and kinetics, nano-particles and drug delivery, and fibres.

show abstract

Introduction

2023

Metal Powder–Based Additive Manufacturing

View full text Add to dashboard Cite

Microstructural evolution and magnetic properties of binder jet additive manufactured Ni-Mn-Ga magnetic shape memory alloy foam

Cited by 127 publications

References 50 publications

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

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

Experimental methods in chemical engineering: Differential scanning calorimetry—DSC

Introduction

Contact Info

Product

Resources

About