Hot compression testing of mild steel industrial reheat furnace scale

1999 ◽  
Vol 70 (11) ◽  
pp. 437-440 ◽  
Author(s):  
John Tiley ◽  
Yimin Zhang ◽  
John G. Lenard
Keyword(s):  
Mild Steel ◽  
Hot Compression ◽  
Compression Testing ◽  
Reheat Furnace ◽  
Furnace Scale

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 Hot compression behaviour and microstructural evolution in aluminium based composites: an assessment of the role of reinforcements and deformation parameters

2021 ◽  
Vol 8 ◽  
pp. 6
Author(s):  
Saheed Adeoye Babalola ◽  
Kenneth Kanayo Alaneme ◽  
Samuel Ranti Oke ◽  
Lesley Heath Chown ◽  
Nthabiseng Beauty Maledi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Matrix Composite ◽  
Stir Casting ◽  
Hot Compression ◽  
Compression Testing ◽  
Aluminium Matrix ◽  
Aluminium Matrix Composite ◽  
Casting Technique ◽  
Deformation Parameters ◽  
Dynamic Recrystallisation

The response of two different types of aluminium matrix composites (AMCs) reinforced with silicon carbide ceramic particulates or nickel metallic particulates to hot compression testing parameters was evaluated. The composites were produced via two-step stir-casting technique. Axisymmetric compression testing was performed on the samples at different deformation temperatures of 220 and 370 °Ϲ, 0.5 and 5 s−1 strain rates and total strains of 0.6 and 1.2. The initial and post-deformed microstructures were studied using optical and scanning electron microscopy. The results show that flow stress was significantly influenced by imposed deformation parameters and the type of reinforcements used in the AMCs. Nickel particulate reinforced aluminium matrix composite (AMC) showed superior resistance to deformation in comparison with silicon carbide reinforced AMC under the different testing conditions. In both AMCs, work hardening, dynamic recovery and dynamic recrystallisation influenced their response to imposed parameters. The signature of dynamic recrystallisation was very apparent in aluminium matrix composite reinforced with nickel particulates.

A Hot Compression Testing Apparatus for the Study of Isothermal Forging

1980 ◽  
Vol 8 (6) ◽  
pp. 273 ◽  
Author(s):  
KC Lieb ◽  
R Horstman ◽  
KA Peters ◽  
RL Meltzer ◽  
MB Vieth ◽  
...  
Keyword(s):  
Hot Compression ◽  
Compression Testing ◽  
Isothermal Forging ◽  
Testing Apparatus

Constitutive base analysis of a 7075 aluminum alloy during hot compression testing

2011 ◽  
Vol 32 (10) ◽  
pp. 4955-4960 ◽  
Author(s):  
M.R. Rokni ◽  
A. Zarei-Hanzaki ◽  
Ali A. Roostaei ◽  
A. Abolhasani
Keyword(s):  
Aluminum Alloy ◽  
Hot Compression ◽  
Compression Testing ◽  
7075 Aluminum Alloy ◽  
Base Analysis

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.

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