Effect of extrusion on Ni55.5Mn25Ga18.5Mo2 shape memory Heusler alloy
Yükleniyor...
Dosyalar
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
In this study, the effects of the extrusion process on the phase structure and shape memory properties of NiMn type Heusler alloy were investigated. For this, Ni55.5Mn25Ga18.5Mo2 alloy obtained by melting method in vacuum induction furnace was extruded at 950 °C, 1000 °C and 1050 °C, respectively. XRD analyzes of the obtained specimens were performed to compare crystallographic differences. Afterwards, metallurgical microscope and SEM photographs were obtained to see the phase structures of the specimens. Phase transformation temperatures were also determined by DSC analysis. In addition, EDS and MAPPING observations of elemental analysis were made. Then, Vickers micro-hardness analyses were performed to examine the effects of extrusion process on microhardness. As a result, the shape memory properties were negatively affected by the increase in extrusion temperature. Generally, with the increase in this temperature, the amount of high temperature phases increased significantly, as micro-hardness values slightly increased. In addition to this, martensitic phase structures decreased with increasing extrusion temperature and martensite and austenite transition temperatures could not be observed in DSC curves.
Açıklama
Anahtar Kelimeler
Smart Materials, Martensite, Extrusion, Heusler Alloy
Kaynak
Materials Today Communications
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
34
