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Sintering regimes and resulting microstructure and properties of binder jet 3D printed Ni-Mn-Ga magnetic shape memory alloys
Acta Materialia ( IF 9.4 ) Pub Date : 2018-08-01 , DOI: 10.1016/j.actamat.2018.05.047
Amir Mostafaei , Pierangeli Rodriguez De Vecchis , Erica L. Stevens , Markus Chmielus

Abstract Binder jet 3D printing was used to produce magnetic shape memory alloy samples with densities increasing from 45% to 99% with increasing sintering temperature from 1000 °C to 1100 °C for 2 h. Within this temperature range, the sintering mechanisms, microstructural evolution, phase transformation and magnetic behavior were investigated and categorized in three different sintering regimes. X-ray diffraction showed that the pre-alloyed ball-milled Ni49.7Mn30Ga20.3 powder has the austenite phase, however, twinned 14 M modulated martensite is present over the entire sintering temperature range with an increasing formation of martensite twins with temperature. At the low temperature sintering regime (

中文翻译:

粘结剂喷射 3D 打印 Ni-Mn-Ga 磁性形状记忆合金的烧结机制和由此产生的微观结构和性能

摘要 采用粘结剂喷射 3D 打印技术生产出密度从 45% 增加到 99% 的磁性形状记忆合金样品,烧结温度从 1000 °C 增加到 1100 °C 2 h。在此温度范围内,研究了烧结机制、微观结构演变、相变和磁行为,并将其分为三种不同的烧结方式。X 射线衍射表明,预合金球磨 Ni49.7Mn30Ga20.3 粉末具有奥氏体相,然而,在整个烧结温度范围内都存在孪晶 14 M 调制马氏体,随着温度的增加,马氏体孪晶的形成增加。在低温烧结制度(
更新日期:2018-08-01
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