Effect of anomalous work-hardening on the stress-sensitivity of the relaxation-rate in polycrystalline metals at low temperatures

1984 ◽  
Vol 3 (11) ◽  
pp. 955-957 ◽  
Author(s):  
Syed Mohsin Raza ◽  
Muhammad Zakria Butt
Keyword(s):  
Relaxation Rate ◽  
Work Hardening ◽  
Low Temperatures ◽  
Stress Sensitivity ◽  
Polycrystalline Metals

Internal friction and sound velocity of polycrystalline metals at very low temperatures

1994 ◽  
Vol 211-212 ◽  
pp. 27-32 ◽  
Author(s):  
Pablo Esquinazi ◽  
Reinhard König ◽  
Dieter Valentin ◽  
Frank Pobell
Keyword(s):  
Internal Friction ◽  
Sound Velocity ◽  
Low Temperatures ◽  
Polycrystalline Metals

Deformation Mechanisms in High-Al Bearing High-Mn TWIP Steels in Hot Compression and in Tension at Low Temperatures

2007 ◽  
Vol 550 ◽  
pp. 217-222 ◽  
Author(s):  
Atef S. Hamada ◽  
L. Pentti Karjalainen ◽  
Mahesh C. Somani ◽  
R.M. Ramadan
Keyword(s):  
Austenitic Steel ◽  
Work Hardening ◽  
Hot Deformation ◽  
Low Temperatures ◽  
Deformation Behaviour ◽  
Tensile Tests ◽  
Mechanical Twinning ◽  
Al Content ◽  
Duplex Steel ◽  
Twip Steels

The hot deformation behaviour of two high-Mn (23-24 wt-%) TWIP steels containing 6 and 8 wt-% Al with the fully austenitic and duplex microstructures, respectively, has been investigated at temperatures of 900-1100°C. In addition, tensile properties were determined over the temperature range from -80 to 100°C. It was observed that in spite of the lower Al content, the austenitic steel possessed the hot deformation resistance about twice as high as that of the duplex steel. Whereas the flow stress curves of the austenitic steel exhibited work hardening followed by slight softening due to dynamic recrystallisation, the duplex steel showed the absence of work hardening and discontinuous yielding under similar conditions. Tensile tests at low temperatures revealed that the austenitic grade had a lower yield strength than that of the duplex grade, but much better ductility, the elongation increasing with decreasing temperature, contrary to that for the duplex steel. This can be attributed to the intense mechanical twinning in the austenitic steel, while in the duplex steel, twinning occurred in the ferrite only and the austenite showed dislocation glide.

Staged work hardening of polycrystalline titanium at low temperatures and its relation to substructure evolution

2002 ◽  
Vol 28 (12) ◽  
pp. 935-941 ◽  
Author(s):  
V. A. Moskalenko ◽  
A. R. Smirnov ◽  
V. N. Kovaleva ◽  
V. D. Natsik
Keyword(s):  
Work Hardening ◽  
Low Temperatures

Microstructure-property hypermaps for shock-loaded materials

1986 ◽  
Vol 44 ◽  
pp. 416-419
Author(s):  
L. E. Murr
Keyword(s):  
Strain Hardening ◽  
Work Hardening ◽  
Residual Deformation ◽  
Dislocation Motion ◽  
Metals And Alloys ◽  
Crystal Defects ◽  
Deformation Mechanisms ◽  
Microstructural Changes ◽  
Polycrystalline Metals

Residual deformation-induced metallurgical effects or structure (microstructure)-property relationships are now generally well documented to be the result of stress or strain-induced microstructures, or microstructural changes in polycrystalline metals and alloys. In many cases, strain hardening, work hardening, or other controlling deformation mechanisms can be described by the generation, movement, and interactions of dislocations and other crystal defects which produce drag, or a range of impedances, including obstacles to dislocation motion.

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