THERMO-MAGNETO-MECHANICAL PROPERTIES IN RAPID-SOLIDIFIED Fe-Pd ALLOY FOIL

Two titanium alloys, OT4 and VT6-c, with a pseudo-α and α + β structure, respectively, were brazed using transient liquid phase (TLP) bonding. To obtain high strength joints an amorphous foil (Ti – 12Zr – 22Cu – 12Ni – 1.5 Be – 0.8V wt.%) was used. Based on microstructural studies and analysis of two- and three-component phase diagrams, the mechanism of the microstructural evolution of the brazed seams of titanium alloys OT4 and VT6-c is described. Brazing at 800 °C with exposure for 0.5 h leads to the formation of a heterogeneous structure consisting of Widmanstätten, eutectoid, and eutectic. Brazed OT4 and VT6-c joints with the presence of a eutectic layer in the centre show low mechanical properties; their ultimate strength lies in a range from 200 to 550 MPa. Increasing the brazing temperature to 840 °C and the exposure time to 2 h, leads to the disappearance of the brittle eutectic component from the seam. This structure typically consists of Widmanstätten with a small number of eutectoid fractions. Joints with the absence of a eutectic layer in the brazed seam demonstrate a strength equal to the base titanium alloys. In this case, failure occurs in the base metal. For brazed samples from the OT4 alloy, the tensile strength value is σb = 750 ± 3 MPa, and for samples from VT6-c, σb = 905 ± 3 MPa. This work was supported by Competitiveness Growth Programme of the Federal Autonomous Educational Institution of Higher Education National Research Nuclear University MEPhI (Moscow Engineering Physics Institute).

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Effects of Annealing Temperature on the Microstructure and Mechanical Properties of Electrodeposited Ni-Fe Alloy Foils

High Temperature Materials and Processes ◽

10.1515/htmp-2015-0247 ◽

2017 ◽

Vol 36 (3) ◽

pp. 223-232 ◽

Cited By ~ 2

Author(s):

H. R. Ren ◽

L. Guo ◽

Z. C. Guo

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Grain Size ◽

Elastic Modulus ◽

Annealing Temperature ◽

Experimental Results ◽

Structure Defects ◽

Alloy Foil ◽

Heat Treated ◽

Average Grain Size

AbstractThe plasticity, elastic modulus and thermal stability restrict the applications of electrodeposited nanocrystalline Ni-Fe alloy foils. To improve its mechanical properties, the electrodeposited Ni-Fe alloy foils were heat treated within the temperature 900–1,150 °C. The microstructure and texture of the samples were further analyzed with a combination of SEM, XRD and EBSD. The experimental results indicated that the electrodeposited Ni-Fe alloy foil had poor mechanical properties at about 1,000 °C, which was mainly attributed to the development of a mixed grain microstructure. At 900–950 °C, the plastic and elastic modulus were greatly improved, which were owed to the uniformed microstructure and the decrease of structure defects. At 1,050–1,150 °C, the degree of the mixed grain microstructure decreased, resulting in improved plasticity and higher elastic modulus. However, the strength of the foil obviously decreased, which was mainly associated with the increase of the average grain size.

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The investigation of the mechanical properties of graded high-temperature shape memory Ti-Ni-Pd alloy

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2019.02.142 ◽

2019 ◽

Vol 787 ◽

pp. 882-892 ◽

Cited By ~ 5

Author(s):

Fatemeh Khaleghi ◽

Mohammad Tajally ◽

Esmaeil Emadoddin ◽

Maryam Mohri

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Shape Memory ◽

Pd Alloy

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Some Effects of Heat-Treatment upon the Mechanical Properties of Electroformed Iron-Nickel Alloy Foil

Journal of Mechanical Engineering Science ◽

10.1243/jmes_jour_1980_022_021_02 ◽

1980 ◽

Vol 22 (2) ◽

pp. 103-105 ◽

Cited By ~ 2

Author(s):

S. H. F. Lai ◽

J. A. McGeough

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Hydrogen Embrittlement ◽

Nickel Alloy ◽

Alloy Steel ◽

Heat Treatments ◽

Alloy Foil ◽

Iron Nickel

Contributions intended for publication as Research Notes should preferably be limited in length to 1000 words and two illustrations, and should be addressed to the Manuscript Section, The Institution of Mechanical Engineers, I Birdcage Walk, Westminster, London SW1H 9JJ The problem of hydrogen embrittlement, which adversely affects the quality and mechanical properties of electroformed iron-nickel alloy foil, is considered. Heat-treatment, such as annealing, can reduce these effects of hydrogen embrittlement. The electroformed metal can also be converted to alloy steel by carburizing; and by other heat-treatments, such as hardening and tempering, a range of mechanical properties for the foil can be achieved.

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Study of Biocompatibility, Mechanical Properties and Microstructural Analysis af Ag-Pd Alloy

Microscopy and Microanalysis ◽

10.1017/s1431927621002415 ◽

2021 ◽

Vol 27 (S1) ◽

pp. 550-552

Author(s):

Jenifer Vaswani-Reboso ◽

Nestor Florido-Suarez ◽

Pedro Socorro-Perdomo ◽

Julia Mirza-Rosca

Keyword(s):

Mechanical Properties ◽

Microstructural Analysis ◽

Pd Alloy

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Evolution of Crystallographic Texture and Mechanical Properties during Annealing of Nanocrystalline Fe-50%Ni Alloy Foil

The Mechanical Behavior of Materials X - Key Engineering Materials ◽

10.4028/0-87849-440-5.781 ◽

2007 ◽

pp. 781-784

Author(s):

Jong Kweon Kim ◽

Shi Hoon Choi ◽

Yong Bum Park

Keyword(s):

Mechanical Properties ◽

Crystallographic Texture ◽

Alloy Foil ◽

Ni Alloy

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RMI Ti BETA-C/Pd

Alloy Digest ◽

10.31399/asm.ad.ti0124 ◽

2001 ◽

Vol 50 (12) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Physical And Mechanical Properties ◽

Bend Strength ◽

Temperature Performance ◽

Pd Alloy

Abstract RMI Ti Beta-C/Pd alloy is a Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd alloy also referred to as Grade 20. It is a palladium-containing version of RMI Beta-C alloy possessing equivalent physical and mechanical properties, but with enhanced corrosion resistance. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength as well as fracture toughness and creep. It also includes information on high temperature performance. Filing Code: TI-124. Producer or source: RMI Company.

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Electroforming and Mechanical Properties of Iron-Nickel Alloy Foil

Journal of Mechanical Engineering Science ◽

10.1243/jmes_jour_1979_021_071_02 ◽

1979 ◽

Vol 21 (6) ◽

pp. 411-417 ◽

Cited By ~ 5

Author(s):

S. H. F. Lai ◽

J. A. McGeough

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Hydrogen Embrittlement ◽

Nickel Alloy ◽

Current Density ◽

Nickel Chloride ◽

Iron Foil ◽

Alloy Foil ◽

Iron Nickel ◽

Current Densities

A method of electroforming smooth, bright, iron-nickel alloy foil, of thickness about 0.1 mm, is developed. The electrolyte, mainly a solution of ferrous chloride and nickel chloride, is operated at a temperature of 95 °C, and at current densities of between 5 and 20 A/dm2. Below that temperature, and at current densities greater than 20 A/dm2, the foil becomes cracked. The amount of nickel co-deposited in the alloy can be increased up to a limit of 6.24 per cent, by reducing the current density and/or increasing the concentration of nickel chloride in the electrolyte. As the nickel content of the foil rises, the material suffers increasingly from hydrogen embrittlement. The main mechanical properties of the alloy foil are more affected by hydrogen embrittlement, the amount of which is influenced by current density and the concentration of nickel chloride, than by changes in grain size. This behaviour is in contrast with that of electroformed iron foil, for which the mechanical properties are largely controlled by the influence of the current density and electrolyte temperature upon its grain size. However, when the other process conditions are held constant, the mechanical properties of the alloy foil behave like the iron foil in decreasing with increasing foil thickness, owing to increases in average grain size.

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Dislocations Motion in Alloys with Periodic Antiphase Boundaries

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010011859x ◽

1985 ◽

Vol 43 ◽

pp. 344-345

Author(s):

G. Vanderschaeve ◽

A. Faress

Keyword(s):

Mechanical Properties ◽

Surface Tension ◽

Plastic Deformation ◽

Average Distance ◽

Antiphase Boundaries ◽

Effective Surface ◽

Shockley Partial ◽

Ordered Alloys ◽

Pd Alloy

Plastic deformation of L12 ordered alloys (Cu3Au type) occurs by slip of dislocation pairs. In alloys with periodic APB's however, dislocations moving through the crystal are continually crossing APB's and mechanical properties of these alloys are affected by conditions governing the propagation of dislocations through them.This paper describes some peculiarities of the interaction of moving dislocations with periodic APB's in a Cu 20.3at%Pd alloy, where the average distance between periodic APB's is Ma∼7.6a. The frequently observed configuration (Fig. 1) consisting of dislocation pairs followed by alternatively widely extended and unsplit unit dislocations can be understood if one analyzes the effective surface tension acting on each Shockley partial.

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