Molybdenum alloys for high temperature applications in air

AbstractMolybdenum and molybdenum alloys are considered to be attractive structural materials for high-temperature applications. However, molybdenum alloys are sensitive to gas impurities and have the characteristics of low temperature embrittlement and less resistance to oxidation at elevated temperature. The toughness and strength of welded joint is not easy to be ensured by traditional technology. Recently, many efforts have been made to join molybdenum and its alloys. In this paper, we present the result of investigations on welding methods of molybdenum and its alloys and overview the practical applications in engineering. The key of joining molybdenum alloys is to improve the toughness of welded joint and prevent the generation of pores and cracks.

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Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100104819 ◽

1988 ◽

Vol 46 ◽

pp. 550-551

Author(s):

R. E. Franck ◽

J. A. Hawk ◽

G. J. Shiflet

Keyword(s):

High Temperature ◽

Elevated Temperature ◽

Grain Growth ◽

Volume Fraction ◽

Microstructural Characterization ◽

Second Phase ◽

Microstructural Stability ◽

Elevated Temperature Strength ◽

Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

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Characterization of Oxidation Protection Coatings for High Temperature Applications by Means of Nanoindentation and Scanning Electron Microscopy Methods

Practical Metallography ◽

10.3139/147.110310 ◽

2014 ◽

Vol 51 (8) ◽

pp. 568-582

Author(s):

R. Webler ◽

S. Neumeier ◽

M. Göken

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

High Temperature ◽

Oxidation Protection ◽

Scanning Electron ◽

Temperature Applications

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FLYLITE ZRE-1

Alloy Digest ◽

10.31399/asm.ad.mg0002 ◽

1952 ◽

Vol 1 (2) ◽

Keyword(s):

Compressive Strength ◽

High Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Base Alloy ◽

Heat Treating ◽

Jet Engine ◽

Temperature Performance ◽

Engine Components ◽

Temperature Applications

Abstract Flylite ZRE-1 is a creep resistant magnesium-base alloy primarily designed for jet engine components and other high temperature applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as creep. It also includes information on high temperature performance as well as casting, heat treating, machining, and joining. Filing Code: Mg-2. Producer or source: Howard Foundry Company.

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THERMALLOY 63W

Alloy Digest ◽

10.31399/asm.ad.ss0352 ◽

1978 ◽

Vol 27 (6) ◽

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Iron Alloy ◽

Heat Treating ◽

Centrifugally Cast ◽

Nickel Chromium ◽

Reformer Tubes ◽

Temperature Applications

Abstract THERMALLOY 63W is a cast nickel-chromium-tungsten-iron alloy produced for service at temperature up to 1900 F. Centrifugally cast reformer tubes comprise one of its high-temperature applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-352. Producer or source: Abex Corporation, Engineered Products Division.

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