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Highly mobile twin boundaries in seven-layer modulated Ni-Mn-Ga-Fe martensite
(PERGAMON-ELSEVIER SCIENCE LTD, 2020-03-15)We report on low twinning stress of 0.2 MPa for type 1 twin boundaries with rational (101) twinning plane and 0.1 MPa for type 2 twin boundaries with rational [(1) over bar 01] twinning direction, in Ni2MnGa0.8Fe0.2 ... -
Transparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sintering
(ELSEVIER SCI LTD, 2020-06-01)The discolouration of magnesium aluminate spinet caused by carbon contamination is a main drawback of fabricating transparent bodies by spark plasma sintering (SPS). In this study, a two-stage heating rate profile was used ... -
Synthesis of high density sub-10 µm (Ba0.85Ca0.15) (Zr0.1Ti0.9)O3-xCeO2 lead-free ceramics using a twostep sintering technique
(TAYLOR & FRANCIS LTD, 2019-10-29)(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3-xCeO2, (BCZTCe) lead-free piezoelectric ceramics were processed conventionally using a two-step sintering technique. The results suggest that two-step sintering is an effective technique to ... -
An Ab Initio Study of Connections between Tensorial Elastic Properties and Chemical Bonds in Sigma5(210) Grain Boundaries in Ni3Si
(2018-11-13)Using quantum-mechanical methods we calculate and analyze (tensorial) anisotropic elastic properties of the ground-state configurations of interface states associated with Sigma5(210) grain boundaries (GBs) in cubic ... -
Machinability and properties of zirconia ceramics prepared by gelcasting method
(TAYLOR & FRANCIS LTD, 2019-10-11)The machinability of newly developed zirconia ceramics for computer numerically controlled milling (CNC) was investigated. The zirconia blanks were prepared by the gelcasting method and tested in the green and two pre-sintered ... -
Nitrogen Interstitial Alloying of CoCrFeMnNi High Entropy Alloy through Reactive Powder Milling
(MDPI, 2019-04-04)The present work is focused on the synthesis of CoCrFeMnNi high entropy alloy (HEA) interstitially alloyed with nitrogen via powder metallurgy routes. Using a simple method, nitrogen was introduced to the HEA from the ... -
Low temperature a/b nanotwins in Ni50Mn25+xGa25x Heusler alloys
(Springer Nature, 2018-08-09)We have found low temperature a/b nanotwins having (110) twinning plane in a five-layered modulated martensite phase of Ni50Mn25+xGa25x (at. %) Heusler alloys and identified the particular region in phase diagram where ... -
Transformation Paths from Cubic to Low-Symmetry Structures in Heusler Ni2MnGa Compound
(Springer Nature, 2018-05-08)In order to explain the formation of low-temperature phases in stoichiometric Ni2MnGa magnetic shape memory alloy, we investigate the phase transformation paths from cubic austenite with Heusler structure to low-symmetry ... -
Automated calibration of advanced cyclic plasticity model parameters with sensitivity analysis for aluminium alloy 2024-T351
(SAGE Publications, 2019-03-18)The plasticity models in finite element codes are often not able to describe the cyclic plasticity phenomena satisfactorily. Developing a user-defined material model is a demanding process, challenging especially for ... -
In-Flight Temperature And Velocity of Powder Particles of Plasma Sprayed TiO2
(Springer, 2013-10-25)This paper relates to the in-flight temperature and velocity of TiO2 particles, an integral part of the systematic research on atmospheric plasma spraying of the material. Initial powder feedstock (32-45 um, 100% rutile ... -
Modification of Plasma Sprayed TiO2 Coatings Characteristics via Controlling the In-flight Temperature and Velocity of the Powder Particles
(Springer, 2014-08-27)The study presents a comprehensive research on the plasma spray fabrication of TiO2 coatings with microstructural properties adjustable via controlling the respective in-flight properties of the feedstock particles. The ... -
Influence of Cold-Sprayed, Warm-Sprayed and Plasma Sprayed Layers Deposition on Fatigue Properties of Steel Specimens
(Springer, 2015-03-10)Titanium powder was deposited onto steel specimens using four thermal spray technologies: plasma spray, low-pressure cold spray, portable cold spray, and warm spray. The specimens were then subjected to strain controlled ... -
Selective Laser Melting Strategy for Fabrication of Thin Struts Usable in Lattice Structures
(MDPI, 2018-09-18)This paper deals with the selective laser melting (SLM) processing strategy for strut-lattice structure production which uses only contour lines and allows the porosity and roughness level to be managed based on ombination ... -
Master Sintering Curve - A Practical Approach to its Construction
(International Institute for the Science of Sintering, 2010-04-01)A practical method for the construction of MSC is presented in the paper. With the help of a few dilatometric sintering experiments the newly developed software calculates MSC and finds the optimal activation energy of a ... -
A Practical Approach for the Calculation of the Activation Energy of the Sintering
(International Institute for the Science of Sintering, 2016-12-15)Newly developed software for calculation of activation energy (Qs in the following) of sintering using the Wang and Raj model is presented. To demonstrate the practical potential of the software and to evaluate the behaviour ... -
Effect of heat treatment on mechanical properties and residual stresses in additively manufactured parts
(Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018-05-14)Heat treatments commonly used for post-processing in additive manufacturing (AM) deal with relieving residual stresses. However, generally these treatments reduce strength properties of material such as yield stress (YS) ... -
Elastic and Plastic Behavior of the QE22 Magnesium Alloy Reinforced with Short Saffil Fibers and SiC Particles
(MDPI AG, 2018-02-15)Magnesium alloy QE22 (nominal composition 2 wt % Ag, 2 wt % mixture of rare earth elements, balance Mg) was reinforced with 5 vol % Saffil fibers and 15 vol % SiC particles. The hybrid composite was prepared via the squeeze ... -
Influence of Scanning Strategies on Processing of Aluminum Alloy EN AW 2618 Using Selective Laser Melting
(MDPI, 2018-02-14)This paper deals with various selective laser melting (SLM) processing strategies for aluminum 2618 powder in order to get material densities and properties close to conventionally-produced, high-strength 2618 alloy. To ... -
Master Sintering Surface – A Practical Approach to Its Construction and Utilization for Spark Plasma Sintering Prediction
(International Institute for the Science of Sintering, 2012-08-01)The sintering is a complex thermally activated process, thus any prediction of sintering behaviour is very welcome not only for industrial purposes. Presented paper shows the possibility of densification prediction based ... -
Sintering Densification Curve - a Practical Approach For Its Construction From Dilatometric Shrinkage Data
(International Institute for the Science of Sintering, 2008-01-01)This article summarizes the usage of high-temperature dilatometry in ceramic processing and powder technology with special attention on the description of the sintering process. A practical method for transformation of ...
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