Physics of Metals and Metallography
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Microstructure and technological plasticity of cast intermetallic alloys on the basis of γ-TiAl
Physics of Metals and Metallography - Tập 109 - Trang 402-410 - 2010
This work is devoted to the estimation of the technological plasticity of binary and alloyed γ titanium aluminides by conducting compression tests at T = 1000°C. The technological plasticity was shown to grow with decreasing size of grains and grain colonies and with increasing amount of β-stabilizing elements in the alloys. The best technological properties are characteristic of the alloys that s......
Hyperfine-interaction parameters and magnetic phase antiferromagnet–ferromagnet transition in Ce(Fe1–x Si x )2
Physics of Metals and Metallography - Tập 117 - Trang 1185-1191 - 2016
Mössbauer spectroscopy study of Ce(Fe1–x
Si
x
)2 compounds with x = 0 and 0.07 was performed at different temperatures. Easy magnetization axis of the CeFe2 ferromagnet at 130 K was shown to be in the {110} plane and to deviate from the [001] axis by ∼10°. Upon cooling, the Ce(Fe0.93Si0.07)2 compound undergoes the ferromagnet–antife......
Structure, mechanical, and tribotechnical properties of an austenitic nitrogen steel after frictional treatment
Physics of Metals and Metallography - Tập 118 - Trang 399-406 - 2017
The features of the structure and the mechanical and tribotechnical properties of an austenitic nitrogen steel (Cr16.5, Mn18.8, C0.07, N0.53, Si0.52 wt %, and Fe for balance) after frictional treatment have been studied. It has been shown that, along with twinning, the nitrogen austenite upon frictional treatment undergoes a γ → stacking fault → ε transformation. The strengthening of the steel by ......
Analysis of Erosion Wear on High Chrome Cast Iron Through Taguchi Approach
Physics of Metals and Metallography - Tập 123 - Trang 1443-1450 - 2023
Slurry erosion in various industries is a significant concern for the components of the slurry handling system. High chrome cast iron is used for highly erosive applications (i.e., mining, thermal power plant, etc.) as a slurry pump for casing and impeller. In this paper effect of significant parameters influencing slurry erosion particle velocity, impact angle, particle size, and concentration wa......
The Effect of Calcium and Zinc on the Structure and Phase Composition of Casting Aluminum–Magnesium Alloys
Physics of Metals and Metallography - Tập 123 - Trang 816-824 - 2022
In this paper, we study a group of alloys based on the Al–Mg–Ca–(Zn) system with various magnesium and calcium contents using computational (in Thermo-Calc software environment) and experimental (optical and scanning microscopy and X-ray microanalysis) methods. The calculated liquidus surfaces show that all alloys fall into the hypoeutectic region. According to the data of nonequilibrium crystalli......
Effect of a glass shell on the crystallization of Fe- and Co-based amorphous microwires
Physics of Metals and Metallography - Tập 110 - Trang 36-41 - 2010
Crystallization of amorphous Fe73.9B13.2Si10.9C2 and Co73.6B11.2Si13C2 microwires in a glass isolation (shell) upon heating has been studied by X-ray diffraction. Crystallization of the core of an amorphous microwire starts at temperatures above 400°C. No noticeable effect of the glass shell on the crystallization of the Fe-based microwire was observed. The crystallization of the Co-based microwir......
Crystal dynamics of the BCC-HCP martensitic transformation: II. Morphology
Physics of Metals and Metallography - - 2008
A dynamic theory of the formation of martensite crystals upon the bcc-hcp transformation based on the concepts of the heterogeneous nucleation and related controlling wave process is presented. It is shown that the entire set of the observed morphological characteristics is unambiguously connected with the trajectory of the martensitic reaction assigned by the controlling wave process. In particul......
Two-Side Growth of the Cu9Ga4 Phase during the Interfacial Reactions between Sn–Ag–Cu–Ga Solders and Copper Substrates
Physics of Metals and Metallography - Tập 120 - Trang 454-458 - 2019
Interfacial reactions between Sn–3.0Ag–0.5Cu–1.0Ga/1.5Ga in wt.% solders and Cu substrates have been investigated. The solder and substrate couples were annealed at 180°C for 6, 12, 18, and 24 days. Different layers of intermetallic compounds have been found to form, such as Cu6Sn5 and Cu9Ga4. Sn was also observed within the interfacial layer during the annealing. The Cu6Sn5 phase and the Cu9Ga4 p......
Resonance peak and incommensurability in cuprate perovskites
Physics of Metals and Metallography - Tập 101 - Trang S17-S20 - 2006
The magnetic susceptibility of yttrium and lanthanum cuprates is interpreted based on the self-consistent solution of the t-J model of Cu-O planes. To take a proper account of strong electron correlations inherent in cuprates, the calculations were carried out in the formalism of the Hubbard operators and Mori’s projection operator technique. The calculations correctly reproduce the frequency and ......
Structural and phase transformations in Hadfield steel upon frictional loading in liquid nitrogen
Physics of Metals and Metallography - Tập 117 - Trang 828-833 - 2016
Structural transformations that occur in 110G13 steel (Hadfield) upon sliding friction in liquid nitrogen (–196°С) have been investigated by metallographic, electron-microscopic, and X-ray diffraction methods. The frictional action was performed through the reciprocating sliding of a cylindrical indenter of quenched 110G13 steel over a plate of the studied steel. A like friction pair was immersed ......
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