Effects of Mo and Ti Additions on The High Temperature Compressive Properties of Iron Aluminides Near Fe3Al

1986 ◽  
Vol 81 ◽  
Author(s):  
R. S. Diehm ◽  
D. E. Mikkola
Keyword(s):  
High Temperature ◽  
Transition Temperature ◽  
Yield Strength ◽  
Work Hardening ◽  
Hot Compression ◽  
Iron Aluminides ◽  
Compression Testing ◽  
Compressive Properties ◽  
Cast Alloys ◽  
Deformation Processes

AbstractHot compression testing has been used to examine the effects of Mo and Ti additions on the yield strength and rate of work hardening for cast alloys near Fe3Al. A few powder processed materials have also been studied. Significant improvements in high temperature compressive properties on alloying have been related to increases in the DO3→B2 transition temperature and the associated changes in the nature of the dislocations involved in the deformation processes.

Precipitate coarsening during hot-compression testing of NiAl + 2 at.% Nb

1986 ◽  
Vol 44 ◽  
pp. 598-599
Author(s):  
W. M. Sherman ◽  
K. M. Vedula
Keyword(s):  
High Temperature ◽  
Flow Stress ◽  
Weight Ratio ◽  
Constant Strain Rate ◽  
Hot Compression ◽  
Compression Testing ◽  
Second Phase ◽  
Precipitate Coarsening ◽  
High Temperature Mechanical Properties ◽  
Ordered Intermetallic

The strength to weight ratio and oxidation resistance of NiAl make this ordered intermetallic, with some modifications, an attractive candidate to compete with many superalloys for high temperature applications. Recent studies have shown that the inherent brittleness of many polycrystalline intermetallics can be overcome by micro and macroalloying. It has also been found that the high temperature mechanical properties of NiAl can be enhanced through the addition of Nb by powder metallurgical techniques forming a dispersed second phase through interdiffusion in a polycrystalline matrix. A drop in the flow stress is observed however in a NiAl-2 at.% Nb alloy after 0.2 % strain during constant strain rate hot compression testing at 1025°C. The object of this investigation was to identify the second phase and to determine the cause of the flow stress drop.

scholarly journals Recovery and Recrystallization Behaviors of Ni–30 Mass Pct Fe Alloy During Uniaxial Cold and Hot Compression

2021 ◽  
Author(s):  
Itsuki Yamaguchi ◽  
Mitsuharu Yonemura
Keyword(s):  
High Temperature ◽  
Carbon Steel ◽  
Dynamic Recrystallization ◽  
Uniaxial Compression ◽  
Work Hardening ◽  
True Strain ◽  
Low Carbon Steel ◽  
Hot Compression ◽  
Low Carbon ◽  
Compression Tests

AbstractThe recovery and recrystallization behaviors of the high-temperature γ-phase of carbon steel during deformation strongly affect the mechanical properties of steel. However, it is difficult to evaluate such behaviors at a high temperature. This study proposes the deformation behavior of the high-temperature γ-phase of low-carbon steel based on the quantitative observation of dislocation density and vacancies in the Ni–30 mass pct Fe alloy. This alloy was used because its stacking fault energy (60 to 70 mJ m-2) is similar to that of low-carbon steel. Uniaxial compression tests were conducted at a strain rate of 10−3 s−1 and 1473 K (1200 °C) for dynamic recrystallization and at 293 K (20 °C) for work hardening. The compression process was interrupted at different strain values to systematically investigate microstructural changes. The changes in work hardening, recovery, and recrystallization behaviors were obtained from the true stress–true strain curves of the uniaxial compression tests. Further, the microstructure changes during cold and hot uniaxial compression were investigated from the viewpoint of lattice defects by X-ray diffraction, positron annihilation analysis, transmission electron microscopy, and electron backscatter diffraction to comprehend the work hardening, dynamic recovery (DRV), and dynamic recrystallization (DRX). This study helps understand the DRV, DRX, and work hardening behaviors in the γ-phase of the Ni–30 mass pct Fe alloy during cold and hot compression.

Toughness of Warm Worked Martensitic Steels

1965 ◽  
Vol 87 (2) ◽  
pp. 307-312 ◽  
Author(s):  
E. J. Ripling ◽  
R. S. Lindberg
Keyword(s):  
Tensile Strength ◽  
Transition Temperature ◽  
Yield Strength ◽  
Room Temperature ◽  
Martensitic Steels ◽  
Tempering Temperature ◽  
Warm Working ◽  
Deformation Processes ◽  
Armor Steel ◽  
Reduction In Area

The Charpy “V” notch transition temperature of quenched and tempered armor steel was lowered by warm stretching at a temperature just below the initial tempering temperature. The transition temperature was lowered almost linearly with prestrain; and a 30 percent deformation suppressed it approximately 150 deg F. This toughness improvement occurred with no change in hardness, although there was a loss in super-transition temperature shelf height. The initial tensile strength of the steel was only slightly changed, while the yield strength was increased and ductility reduced. The enhanced toughness persisted through retempering after warm working. The added heating did not change the hardness while the supertransition shelf was brought back to its “as-received” level. In addition, the tensile strength, yield strength, elongation, and reduction in area of the warm stretched plus tempered and “as-received” steel were essentially identical, resulting in a net increase in toughness. A severe room temperature toughness loss was produced by compressive prestrains in excess of about 10 percent. Retempering after straining not only delayed this precipitous loss until the strain exceeded 25 percent, but also raised the Charpy energy after small compressions to about 140 percent of its “as-received” values. Step-wise prestraining was found to be as effective as a single straining step in lowering transition temperatures. In a single test series warm working by rolling was compared with stretching. The suppression of the transition temperature was found to be almost identical for the two deformation processes.

MAGNESIUM MSR-B

Alloy Digest ◽  
1967 ◽  
Vol 16 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Magnesium Alloy ◽  
Yield Strength ◽  
Physical Properties ◽  
Heat Treating ◽  
Temperature Performance ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

Abstract Magnesium MSR-B is a heat-treatable magnesium alloy with highest yield strength of any cast magnesium alloy up to 480 F. It is pressure tight and weldable by argon-arc. It is recommended for aircraft nose wheels, missile components, transmission cases, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Mg-63. Producer or source: Magnesium Elektron Ltd.

MAGNESIUM MSR-A

Alloy Digest ◽  
1962 ◽  
Vol 11 (7) ◽  
Keyword(s):  
Compressive Strength ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Magnesium Alloy ◽  
Yield Strength ◽  
Physical Properties ◽  
Heat Treating ◽  
Temperature Performance ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

Abstract Magnesium MSR-A is a heat-treatable magnesium alloy with highest yield strength of any cast magnesium alloy up to 480 F. It is pressure tight and weldable by argon-arc. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, and joining. Filing Code: Mg-52. Producer or source: J. Stone & Company Ltd.

ALLEGHENY LUDLUM TYPE 305

Alloy Digest ◽  
2002 ◽  
Vol 51 (1) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Work Hardening ◽  
Deep Drawing ◽  
Heat Treating ◽  
Cold Forming ◽  
Temperature Performance ◽  
Low Rate

Abstract Allegheny Ludlum Type 305 (S30500) stainless steel is used for applications requiring a low rate of work hardening during severe cold-forming operations such as deep drawing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-840. Producer or source: Allegheny Ludlum Corporation.

JOSLYN STAINLESS TYPE 305H

Alloy Digest ◽  
1966 ◽  
Vol 15 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Stainless Steels ◽  
Work Hardening ◽  
Heat Treating ◽  
Nickel Steel ◽  
Temperature Performance ◽  
Hardening Factor

Abstract Joslyn Stainless Type-305H is a modified austenitic chromium-nickel steel recommended for severe cold heading applications because of its low work-hardening factor. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-178. Producer or source: Joslyn Stainless Steels.

USS DUAL PHASE 80

Alloy Digest ◽  
1978 ◽  
Vol 27 (12) ◽  
Keyword(s):  
United States ◽  
Corrosion Resistance ◽  
Yield Strength ◽  
Work Hardening ◽  
Steel Sheet ◽  
High Strength ◽  
Heat Treating ◽  
Dual Phase ◽  
United States Steel Corporation ◽  
Heavy Construction

Abstract USS Dual Phase 80 is a high-strength steel sheet which has a dual phase structure of martensite and ferrite. It provides all the benefits of higher strength with little sacrifice in ductility, formability or weldability. Dual Phase 80 gains strength as it is formed through rapid work hardening of its unique microstructure; in fact, it increases from its delivered yield strength of 50,000 psi up to 80,000 psi (or more) in forming. Its final strength depends on the amount of forming. Its many applications include automotive vehicles, farm equipment and heavy construction equipment. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-352. Producer or source: United States Steel Corporation.

JALLOY-S

Alloy Digest ◽  
1963 ◽  
Vol 12 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Yield Strength ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
Temperature Performance ◽  
Trade Name ◽  
S 100 ◽  
Minimum Yield

Abstract Jalloy-S is the trade name of a group of constructional steels which combine high strength with welding and forming ease. They are available in three grades according to their minimum yield strength, namely, Jalloy-S-90, Jalloy-S-100, and Jalloy-S-110. 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 as well as forming, heat treating, machining, and joining. Filing Code: SA-144. Producer or source: Jones & Laughlin Steel Corporation.

High-temperature carbon plastics based on thermoreactive polyimide binder

2020 ◽  
pp. 89-102
Author(s):  
M. I. Valueva ◽  
I. V. Zelenina ◽  
M. A. Zharinov ◽  
M. A. Khaskov
Keyword(s):  
Glass Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Strength Properties ◽  
High Glass Transition Temperature ◽  
Reinforced Plastics ◽  
Carbon Plastics ◽  
Fundamental Possibility ◽  
Fiber Reinforced Plastics

The article presents results of studies of experimental carbon plastics based on thermosetting PMRpolyimide binder. Сarbon fiber reinforced plastics (CFRPs) are made from prepregs prepared by melt and mortar technologies, so the rheological properties of the polyimide binder were investigated. The heat resistance of carbon plastics was researched and its elastic-strength characteristics were determined at temperatures up to 320°С. The fundamental possibility of manufacturing carbon fiber from prepregs based on polyimide binder, obtained both by melt and mortar technologies, is shown. CFRPs made from two types of prepregs have a high glass transition temperature: 364°C (melt) and 367°C (solution), with this temperature remaining at the 97% level after boiling, and also at approximately the same (86–97%) level of conservation of elastic strength properties at temperature 300°С.

Sign in / Sign up

Export Citation Format

Share Document