Synthesis and Characterization of Zirconium based Bulk Amorphous Alloys

2005-09-28
In recent years, bulk amorphous alloys and nanocrystalline materials have been synthesized in a number of ferrous and non-ferrous based alloys systems, which have gained some applications due to their unique physico-chemical and mechanical properties. In the last decade, Zr-based alloys with a wide supercooled liquid region and excellent glass forming ability have been discovered. These systems have promising application fields due to their mechanical properties; high tensile strength, high fracture toughness, high corrosion resistance and good machinability. In this study, the aim is to model, synthesize and characterize the Zr-based bulk amorphous alloys. Initially, theoretical study on the basis of the semi-empirical rules iv well known in literature and the electronic theory of alloys in pseudopotential approximation has been provided in order to predict the potential impurity elements that would lead to an increase in the GFA of the selected Zr-Ni, Zr-Fe, Zr-Co and ZrAl based binary systems. Furthermore, thermodynamic and structural parameters were calculated for mentioned binary and their ternary systems. According to the theoretical study, Zr67Ni33 binary system was selected and its multicomponent alloys were formed by adding its potential impurity elements; Mo, W and Al. Centrifugal casting method was used to produce alloy systems. Structural characterizations were performed by DSC, XRD, SEM and EDS methods. In the near-surface regions of Zr60Ni25Mo10W5 and Zr50Ni20Al15Mo10W5 alloys, amorphous structure has been observed. Experimental studies have shown that Zr-Ni based systems with impurity elements Mo, W and Al, not widely used in literature, might be good candidates for obtaining high GFA.

Suggestions

Synthesis and characterization of zirconium based bulk amorphous alloys
Saltoğlu, İlkay; Akdeniz, Mahmut Vedat; Department of Metallurgical and Materials Engineering (2004)
In recent years, bulk amorphous alloys and nanocrystalline materials have been synthesized in a number of ferrous and non-ferrous based alloys systems, which have gained some applications due to their unique physico-chemical and mechanical properties. In the last decade, Zr-based alloys with a wide supercooled liquid region and excellent glass forming ability have been discovered. These systems have promising application fields due to their mechanical properties; high tensile strength, high fracture toughne...
Synthesis and Structural Characterization of Multifunctional Ti Alloy: Gum Metal
Elçin, Orkun; Mekhrabov, Amdulla O.; Akdeniz, Mahmut Vedat (null; 2018-10-27)
A relatively new class of ȕ-phase having a body-centered cubic structure Ti alloy termed multifunctional titanium alloy (MFTA) or ‘Gum Metal’ with the composition of Ti-23Nb-07Ta-2Zr-O (mole %) has been shown to possess many interesting properties such as superplasticity at room temperature without extensive work hardening. In the heavily deformed state, it also possesses an ultra-low elastic modulus, ultra-high strength, large elasticity, and Elinvar and Invar properties. In this study, we have synthesized...
Synthesis and characterization of Ti-based bulk amorphous/naocrystalline alloys for engineering applications
Abdelal, Ali; Akdeniz, Mahmut Vedat; Department of Metallurgical and Materials Engineering (2004)
Amorphous and bulk amorphous metallic alloys are an intriguing class of structural materials and possess a range of interesting properties, including near theoretical strength, high hardness, extremely low damping characteristics, excellent wear properties, high corrosion resistance, low shrinkage during cooling and almost perfect as-cast surfaces with good potential for forming and shaping. In this study, new Ti-based bulk amorphous alloys are tried to be modeled and synthesized. For that purpose, electron...
Synthesis and characterization of copper based bulk amorphous alloys
Erdem, Mermer; Akdeniz, Mahmut Vedat; Mekhrabov, Amdulla O.; Department of Metallurgical and Materials Engineering (2013)
Copper based bulk metallic glasses (BMG’s) are one of the promising advanced materials due to their unique mechanical properties, high glass forming ability (GFA) and low cost. In this thesis, the aim is to synthesize Cu-Hf based BMG’s and to investigate the crystallization behavior. Moreover, the crystallization kinetics by means of activation energies, critical cooling rate, nanocrystallization and Avrami exponents have been studied. Cu70Hf30 and Cu50Hf50 binary alloys were produced via arc melting with s...
Development of Nanostructured Metallic Glasses with High Toughness
Bagheri Behboud, Ali; Özerinç, Sezer; Department of Mechanical Engineering (2021-8)
Metallic glasses are metallic alloys with disordered atomic structures and desirable mechanical properties such as high hardness, high elastic limits, and wear resistance. These properties make metallic glasses promising materials for wear-resistant, corrosion-resistant, and biocompatible coating applications. On the other hand, metallic glasses are brittle, which is a major disadvantage for their use in practice. This thesis study aimed to tackle this problem through the development of nanostructured metal...
Citation Formats
İ. Saltoğlu, M. V. Akdeniz, and A. Mehrabov, “Synthesis and Characterization of Zirconium based Bulk Amorphous Alloys,” 2005, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/76672.