scholarly journals Development of Powder Metallurgy Aluminum Alloys with High Strength and High Elevated Temperature Strength

2009 ◽  
Vol 56 (11) ◽  
pp. 697-708 ◽  
Author(s):  
Hisamichi Kimura ◽  
Kenichiro Sasamori ◽  
Akihisa Inoue
Keyword(s):  
Elevated Temperature ◽  
Powder Metallurgy ◽  
Aluminum Alloys ◽  
High Strength ◽  
Elevated Temperature Strength

scholarly journals Bimodal Microstructure Obtained by Rapid Solidification to Improve the Mechanical and Corrosion Properties of Aluminum Alloys at Elevated Temperature

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 230
Author(s):  
Irena Paulin ◽  
Črtomir Donik ◽  
Peter Cvahte ◽  
Matjaž Godec
Keyword(s):  
Elevated Temperature ◽  
Aluminum Alloys ◽  
Melt Spinning ◽  
High Strength ◽  
Tensile Tests ◽  
Chemical Compositions ◽  
Corrosion Properties ◽  
Transmission Microscopy ◽  
Aa5083 Alloy ◽  
Mechanical And Corrosion Properties

The demand for aluminum alloys is increasing, as are the demands for higher strength, with the aim of using lighter products for a greener environment. To achieve high-strength, corrosion-resistant aluminum alloys, the melt is rapidly solidified using the melt-spinning technique to form ribbons, which are then plastically consolidated by extrusion at elevated temperature. Different chemical compositions, based on adding the transition-metal elements Mn and Fe, were employed to remain within the limits of the standard chemical composition of the AA5083 alloy. The samples were systematically studied using light microscopy, scanning electron, and transmission microscopy with electron diffraction spectrometry for the micro-chemical analyses. Tensile tests and Vickers microhardness were applied for mechanical analyses, and corrosion tests were performed in a comparison with the standard alloy. The tensile strength was improved by 65%, the yield strength by 45% and elongation by 14%. The mechanism by which we achieved the better mechanical and corrosion properties is explained.

Microstructure of borides in titanium and titanium aluminides

1990 ◽  
Vol 48 (4) ◽  
pp. 982-983
Author(s):  
Daniel S. Schwartz ◽  
S. M. L. Sastry
Keyword(s):  
Elevated Temperature ◽  
Titanium Alloys ◽  
Titanium Aluminides ◽  
High Strength ◽  
Rapid Solidification Processing ◽  
Solidification Processing ◽  
Elevated Temperature Strength ◽  
Hardening Mechanism ◽  
Aerospace Applications ◽  
Hard Particles

The high strength-to-weight ratios and high elevated-temperature strength of dispersion strengthened titanium and titanium aluminides make them attractive materials for aerospace applications. A fine dispersion of hard particles is introduced into these alloys to increase their strength through an Orowan hardening mechanism. In addition to strengthening the material, dispersoids with whisker morphologies can produce toughening. Titanium alloys containing boride dispersions are currently being investigated at McDonnell Douglas Research Laboratories, and the microstructure of the dispersoids will be reported in this paper. Fine boride dispersions were produced in alloys with the compositions Ti-6B, Ti-25A1-4B and Ti-48A1-5B (at.%) using rapid solidification processing. The alloys were then annealed at ∼800°C/1 h, TEM specimens produced by electropolishing, and the structure of the borides examined in detail with a JEOL 2000FX TEM.

High Strength Aluminum Alloys Reinforced by Nanosize Quasicrystalline Particles for Elevated Temperature Application

2006 ◽  
Vol 25 (1-2) ◽  
pp. 19-30 ◽  
Author(s):  
Yu.V. Milman, ◽  
A.I. Sirko, ◽  
M.O. Iefimov, ◽  
O.D. Niekov, ◽  
A.O. Sharovsky, ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Aluminum Alloys ◽  
High Strength ◽  
Temperature Application ◽  
High Strength Aluminum Alloys

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

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.

CYCLOPS BHT

Alloy Digest ◽  
1965 ◽  
Vol 14 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Elevated Temperature ◽  
High Speed ◽  
High Speed Steel ◽  
High Strength ◽  
Heat Treating ◽  
High Load ◽  
Structural Components ◽  
Temperature Performance

Abstract Cyclops BHT is a low-alloy martensitic high-speed steel of the molybdenum type recommended for high strength, high load structural components designed for elevated temperature service. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-173. Producer or source: Cyclops Corporation.

ALMAR 300 ALLOY

Alloy Digest ◽  
1978 ◽  
Vol 27 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Elevated Temperature ◽  
Cold Working ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Ultra High Strength Steel ◽  
Wide Range ◽  
Iron Nickel ◽  
Useful Yield

Abstract ALMAR 300 Alloy is a vacuum-melted ultra-high-strength steel. The annealed structure of this alloy is essentially a carbon-free, iron-nickel martensite (a relatively soft Rockwell C 28) that can be strengthened by cold working and elevated-temperature (900-950 F) age hardening to useful yield strengths as high as 300,000 psi. The unique properties of this alloy make it suitable for a wide range of section sizes. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-349. Producer or source: Allegheny Ludlum Corporation.

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