Mechanical Properties Of Alloys Of The Ti−Ta System At Low Temperatures

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Fabrication of metallic multi-material components using Laser

show good miscibility at low temperatures and there is no formation of intermetallic phases. Furthermore due to similar CTE the bonding zone is less susceptible to thermally induced cracking. Figure 2: Ti-Ta binary phase diagram [10] Taking into account the stated processing characteristics Ti6Al4V and tantalum were successfully joined by LMD.

Effect of Re on microstructure and mechanical properties of γ

low density and high ductility [12 18]. However, the application of the Co 3Ti phase is limited due to its disadvantages of low volume fractions, high γ/γ′ lattice parameter mismatch [19 21]. Recently, some re-searchers tried to alloy other elements such as V and Cr in the Co-Ti-based system to improve the microstructure stability and

TiTaCN-Co Cermets Prepared by Mechanochemical Technique

Microstructure and mechanical characterization of (Ti,Ta)(C,N)-Co based solid solution cermets prepared by two mechanochemical synthesis processes (one- and two-step milling) and a pressureless sintering in protective helium atmosphere.

Study of Materials used in Gas Turbine engine and swirler in

Cr Alloys: This Category of alloys has a combination of properties that makes it especially valuable for turbine wheels. These properties include good ductility at high-strength levels, uniform properties throughout thick sections and favorable strength at temperatures up to about 9000F (4820C). Alloy M-152 is a 2-3% nickel-containing

Processing and mechanical characterization of hydrid Al-Ti-Ta

-7fW-'^, TABLEOFCONTENTS page ACKNOWLEDGMENTS ii ABSTRACT v CHAPTERS ONEINTRODUCTION 1 TWOBACKGROUND 4 Al-Ti-TaTernaryAlloys 4 DesignofIntermetallicMatrix Composites 11

ACADEMIC REGISTRY Research Thesis Submission

The elements used in the alloys are nickel free and biocompatible with human physiology. Most of the alloys reviewed are suitable for biomedical applications, that is, the alloys are capable of phase changes with shape memory properties (shape memory effect and superelasticity) at low temperatures: room temperature

FeMnNiAl Iron-Based Shape Memory Alloy: Promises and Challenges

superelasticity is limited to low temperatures (below 0 C) while the FeNiCoAlTi [7] and FeNiCoAlTa [21] exhibit superelasticity at room temperature and above with SE strain levels near 7%, but show rapid cyclic degradation. On the other hand, the newly discovered FeMnNiAl alloys undergo bcc to fcc transformation [22] with high trans-

ELECTRON CONCENTRATION AND PHASE STABILITY IN NbCr2-BASED

mechanical properties at elevated temperatures. However, their low ductility and brittle fracture characteristics at ambient temperatures are the main concerns for structura applications of these materials. One attractive way to improve the deformability of complex Laves phases is to control their crystalline structure in a way that stress

Formation and Dissolution of Precipitates in IN792 Superalloy

test) [18] at various temperatures. The specimens were cyclically strained in a computer controlled electro-hydraulic MTS testing system with constant strain rate 2 10 3 s 1. The total duration at the elevated temperature in the low-cycle fatigue test was roughly 6 h (approximately 4 h hold at the given temperature prior the cycling and 2 h

arXiv:1804.04546v1 [cond-mat.mtrl-sci] 12 Apr 2018

Furthermore, Ti-Ta-Al and Ti-Ta-Sn alloys have shown a signi cantly smaller decrease of the transformation temperatures after ageing, which was attributed to a shift of the phase decomposition reaction ! + ! to higher temperatures [19, 25]. These improved properties make Ti-Ta-Al, Ti-Ta-Sn, and Ti-Ta-Zr the state-of-the-art candidates for Ti-type

High temperature materials for aerospace applications

nickel-based superalloys have continuously evolved with the aim of increasing their mechanical strength and temperature capability. Table I : Typical chemistries of superalloys for single crystal components (wt. %) Alloy Ni Co Cr Mo Re Ru W Al Ti Ta Nb Hf C B Zr Si DS Mar-M247* Base 10 8.3 0.7 - - 10 5.5 1 3 - 1.4 0.15 0.015 0.05 -

Phase stability and elastic properties of β Ti Nb X (X = Zr

mechanical alterations of Ti-Nb alloys J. J. Gutiérrez Moreno et al-Unusual composition dependence of transformation temperatures in Ti-Ta-X shape memory alloys Alberto Ferrari et al-This content was downloaded from IP address 157.55.39.228 on 22/12/2019 at 13:39

THE QUEST FOR SAFE AND RELIABLE FUEL CLADDING MATERIALS

The properties associated to the FeCrAl alloys become them more appropriate to be used as cladding material in lead-cooled reactors instead of PWR. Lead-cooled reactors work in temperatures lower than 500 oC, condition that a thin protective alumina layer is formed reducing the corrosion issue that liquid lead invokes [19].

Open Access proceedings Journal of Physics: Conference series

May 25, 2021 The effect of additives on the mechanical properties of the Cr-Ni alloy at 20, 900 and 1080 °С was shown. The microstructure of alloys I and II was studied in the fracture zone of samples after tensile tests at different temperatures. We studied the effect of small additives on the

Preparation, structural characterization, and

titanium and the Ti-Ta alloys have shown promise for this application [3]. In this sense, many efforts have been made to characterize and to understand the behavior of Ti-Ta alloys, and this paper presents the preparation, structural characterization, and biocompatibility of Ti-Ta alloys with different tantalum content.

Thermal and Mechanical Behaviors of High Temperature Coatings

temperatures, some cheaper Fe-based alloys can be chosen for manufacturing of the components. High-strength Al/Ti alloys are often used in the aero-engine applications for weight reduction [3]. For the components in combustion and turbine sections, however, materials with super thermal and mechanical properties are

First-Principles Study of Mechanical and Thermodynamic

Mar 13, 2021 (DFT) have been employed to reveal and predict the structural, mechanical, and physical properties of the Co-based alloys. In a related study, Xu et al. [18] computed the electronic band structure as well as mechanical and thermal dynamic properties of Co3X (X = Ti, Ta, W, V and Al) with the cubic L12 and DO19 phases. The authors confirmed

Developments in the Ni Nb Zr amorphous alloy membranes

M = Ti, Ta, Sn, Si, Pd, Cu, Co, and Al, and reported rel-atively high permeation rates. The permeabilities of Cu and Co are reported as 2.34 9 10-8 and 2.46 9 10-8 mol m-1 s-1 Pa-0.5 at 673 K, respectively [32]; these values are as high as those of well-known conventional Pd 23 %Ag alloys, which have a permeation rate of

Nickel-Based Superalloys for Advanced Turbine Engines

phase. Additions of Ti, Ta, and Nb contribute to the formation and strengthening of the Ni 3(Al, Ti, Ta, Nb) γ phase.2,3 Additions of iron form the basis of an important group of Ni-Fe superalloys, with the most common alloy being IN 718 (Table 1); although this class of superalloys is not discussed in any detail here, there is extensive

Linking the Properties, Processing and Chemistry of Advanced

series of alloys, the low cycle fatigue properties were evaluated over a range of stresses at 750˚C under constant stress conditions. Following testing, the deformed microstructures were evaluated under both the SEM and TEM. Table I: Nominal Compositions of the Experimental Alloys (wt.%) Alloy Ni Al Cr Co Mo Ti Ta W Re Ru Hf

Oxide Dispersion Strengthened Majority g' Phase Nickel-Base

dispersion strengthened (00.5) alloys, based on the Ni-Cr-Al system, which would derive a significant high temperature strength increment from the retention of high volume fractions 050%) of Y' at 1093°C. The effects of quaternary additions of the alloying elements Ti, Ta, Nb, MO, W, Co and Hf on the

The following article appeared in Journal of Materials

Mechanical alloying Titanium alloys Phase transitions Powder consolidation a b s t r a c t A series of Ti 30Zr alloys have been synthesized by the spark plasma sintering (SPS) process using a mixture of elemental powders processed by mechanical alloying. A sintering tem-

Effects of Processing on Microstructure and Properties of Ti

Binary Ti-Ta alloys are particularly amenable to heat treatment, as a fully beta structure can be achieved at room temperature5. Previous work on Ti-Ta alloys of composition ranging from 20 - 60 wt% Ta has shown that the Ti-30 wt% Ta alloy provides a promising combination of mechanical properties, elongation, and homogeneity6. The elastic

[email protected]): F.

The mechanical properties of Ti-Ta alloys have been reviewed in a previous paper [8] and are not repeated here except as required. Other work in this system is confined to phase equilibria [5,9-171, and oxidation behavior [3,18-201. Some of the issues relevant to casting Ti-Ta alloys are described in a related paper Experimental Procedures

High-Temperature Corrosion Failure of Single Crystal Super

mechanical properties of metals can be modified by heat treatment. Blade materials must be resistant to such changes and the microstructure must remain stable at high temperatures. The density must be low to keep engine weight as low as possible. Metallurgists have developed super-alloys to meet these stringent specifications.

AN ABSTRACT OF THE THESIS OF - Oregon State University

Na Li for the degree of Master of Science in Mechanical Engineering presented on April 13, 2001. Title: Metallurgy and Superconductivity of Niobium-Titanium-Tantalum Ternary Alloy System. Abstract approved: William H. Warnes The metallurgy and superconductivity of the Nb-Ti-Ta ternary alloy system were studied.

On the functional degradation of binary titanium tantalum

that binary Ti Ta alloys lack functional stability.12 14 This is attributed primarily to the formation of the !-phase, which is known to form in similar alloys like Ti Nb, for example.12 Concomitant, the high-temperature parent β-phase in Ti-Ta alloys is stabilized down to lower temperatures and conse-

MECHANICAL BEHAVIOR OF A THERMO-MECHANICAL PROCESSED TI-25TA

the β phase in Ti Ta Zr system [11]. Thermo-mechanical processing is often performed on titanium alloys to attain a desired combination of mechanical properties. Specimens, in as-cast, cold rolled and recrystallized conditions, were examined by scanning electron microscopy (SEM).

Elucidating the microstructural development of refractory

To study the phase equilibria of the Ti-Ta-Zr system a series of alloys with a fixed Ti content and varying concentrations of Ta and Zr were produced via arc melting from elemental metals (≥ 99.5 % purity). The nominal compositions of these alloys were: 45Ti-15Ta-40Zr, 45Ti-25Ta-30Zr, 45Ti-35Ta-20Zr and 45Ti-45Ta-10Zr at.%, as shown in Figure 1.

Ir-base refractory superalloys for ultra-high temperatures

The microstructure and compression strengths of Ir-15 at. pct X (X 5 Ti, Ta, Nb, Hf, Zr, or V) binary alloys at temperatures between room temperature and 1800 7C were investigated to evaluate the potential of these alloys for ultra-high-temperature use. The fcc and L1 2 two-phase structures of

Alloy design for intrinsically ductile refractory high

Zr, Ta-Ti, Ta-Zr, and Ti-Zr) also form continuous bcc solid solutions in the entire composition range just below solidus temperatures but can transform fully or partially to hcp solid solutions at low temperatures.26 The bcc solid solution that was achieved in the as-cast Hf 0.5Nb 0.5Ta 0.5Ti 1.5Zr alloy is

Investigation of Solid Solution Hardening in Molybdenum Alloys

Owing to their outstanding combination of high temperature properties like high melting point, low vapour pressure and high temperature strength molybdenum and its alloys have been in focus for a variety of applications for several decades. Extensive work on the development of molybdenum based alloys was done in the 1950`s and 1960`s by

Effect of Indium Content on the Microstructure, Mechanical

The mechanical properties of Ti alloys are influenced by their microstructure, which, in turn, depends on chemical composition and synthetic processing. In fact, the key to this research resides in the judicious choice of the alloying elements. Therefore, in order to improve the mechanical properties of Ti, it is necessary to understand the effect

Cold Spray Systems And Components From CGT GmbH For The

2. SYSTEM OVERVIEW 2.1 Kinetiks®2000 The Kinetiks®2000 is a portable system with a light-weight spray gun which can be operated by hand. In contrast to the other CGT systems, the gas pressure is limited to 20 bar and the gas temperature to 400°C. The system is primarily intended for the use in maintenance and repair

Functional Fatigue and Tension Compression Asymmetry in [001

of these alloys. For actuation at elevated temperatures the Ti Ta system has been proposed as a promising alternative [15, 16]. The material can be cold worked to high degrees of deformation reducing manufacturing costs significantly. However, pseudoelasticity (PE) has not been demonstrated for Ti Ta HT-SMAs.

Formation, and Properties of Mechanically Alloyed Ultrafine

Jan 27, 2020 Low Young modulus alloys are not mentioned to be only the titanium-based alloys. Mechanical properties of materials as Zr-12Nb-4Sn seems to be also interesting [33]. Nowadays, the majority of Ti-Nb-Zr alloys are produced by traditional methods as vacuum arc remelting (VAR) [34,35]. Mechanical alloying allows us to form the nonequilibrium structures

Platinum-based alloys for high temperature and special

additions on the creep properties of Pt-Al-Z alloys at 1300°C11. The ternary elements (Z = Ti, Cr, Ru, Ta, and Ir) were selected to improve the high-temperature mechanical properties and phase stability of the alloys, in accordance with the findings of Hill et al.10. The Pt:Al:Z ratios of the alloys tested were standardized to eliminate effects of

Multi-scale modelling of Suzuki segregation in γ

These alloys typically have a microstructure of coherent γ ordered precipitates with L1 2 structure embedded in a FCC γ matrix. Recently, similar (γ + γ) microstructures have also been reported in Co-base superalloys based on the Co-Al-W system [2]. The composition of γ is typically Ni 3(Al,Ti,Ta) and Co 3(Al,W) in Ni-base and Co-base