X-Ray Diffraction Study of the Reverse Martensitic Transformation In Cu-Al-Ni Shape Memory Alloy
Journal Title: Analele Universitatii "Dunarea de Jos" din Galati. Fascicula IX, Metalurgie si Stiinta Materialelor - Year 2008, Vol 31, Issue 2
Abstract
The paper presents an X ray diffraction study for a cooper based shape memory alloy. The behavior of CuAl13Ni4 alloy, which exhibits a peculiar property, is evaluated by structural changes. On cooling, the martensitic transformation takes place from the ordered structures to the long period two layered structure. The crystalline phase transformations of those alloys are very sensitive to the heat treatments, deformation degrees and also to the undesired aging effects. In particular, the study has been made on the CuAl13Ni4 shape memory alloy samples after being hot extruded, quenched and aged in martensitic state.
Authors and Affiliations
Carmela GURAU, Gheorghe GURAU, F. M. Braz FERNANDES
The Unusual Electromagnetic Proprieties of Fabric Reinforced Epoxy Composites
In this research, the electromagnetic behavior of four composite materials was investigated as an important issue of composite researchers is to control the electrical properties of polymer matrix composites. The four ma...
Characterisation of CVD Niobium Carbide Coatings on Hard Carbide Substrate
Hard coatings are often used for mechanical properties such as wear and friction resistance. The corrosion behaviour may also be an important criterion for industrial applications of these coatings. In this paper, the pr...
Radial Forging Machine. Technology for Axle Type Parts
his paper presents three types of radial forging machines to produce the axle type pieces. The new types of radial forging machines are presented cinematically. The movement of the deformation tools at these types of mac...
The Laboratory Experiments Regarding the Intercritical Heat Treatments Applied on the Low - Alloyed Steel
The paper presents the research results regarding the influence of the intercritical thermal treatments carried out on some hypoeutectoid steel castings. The purpose of this research at the laboratory scale is to measure...
The Influence of the Thermomagnetic Treatments on the Hardness Number of Steels and the Superficial Layers Nitrided Durability
Two types of steels subjected to a nitriding thermo-chemical treatment after thermomagnetic treatments. The structural aspects into superficial layer of these steels are studied during friction process by using of an Ams...