STRUCTURAL EVOLUTION OF THE NiTi/NiFeGa SMART HYBRID MATERIAL DURING SEVERE PLASTIC DEFORMATION

被引：0
作者：
Gurau, C. [1 ]
Gurau, G. [1 ]
Tolea, F. [2 ]
Sampath, V [3 ]
机构：
[1] Dunarea de Jos Univ Galati, Fac Engn, Domneasca St 47, RO-800008 Galati, Romania
[2] Natl Inst Mat Phys, POB MG-7, Bucharest 77125, Romania
[3] Indian Inst Technol Madras, Dept Met & Mat Engn, Chennai 600036, Tamil Nadu, India
来源：
DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES | 2019年 / 14卷 / 03期
关键词：
Hybrid material; Composite; Shape memory alloy; Ni-Ti; Heusler alloy; Ni-Fe-Ga; Severe plastic deformation; HSHPT; Ultrafine grained materials; SHAPE-MEMORY ALLOY; MECHANICAL-PROPERTIES; MICROSTRUCTURE; COMPOSITE; TRANSFORMATION; TRANSITIONS; BEHAVIOR; TEXTURE;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
High speed high pressure torsion (HSHPT) a patented new approach is proposed to fabricate nanocomposites. The goal of this work is to investigate the NiTi/NiFeGa bilayer hybrid material with nano- and submicrocrystalline structure under the influence of HSHPT. Apart from the grain refinement, the effectiveness of the joint are revealed scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The mechanical properties of the composite layers in bulk and after severe plastic deformation are investigated. Bi-layered composite disks consisting of NiTi shape memory alloy and NiFeGa - Heusler type alloy, exhibit thermoelastic structural martensitic transformation. Submicrocrystalline structure is formed in the both layers of the hybrid material. It is also ascertained significant hardening of each layer of the hybrid as a result of HSHPT. The results highlight market differences between the bulk and the hybrid and the role of severe plastic deformation on martensitic transformation.
引用
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页码：539 / 546
页数：8
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