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Deformation mechanisms in hot working
JOM, 19681. During deformation at a constant temperature above 0.5Tm, there is a steady-state regime where both stress and strain rate remain constant independent of strain. 2. The interdependence of stress, strain rate and temperature during steady-state hot working and secondary creep are similar. 3.
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Hot Deformation Behavior during the Hot Compression of AZ31 Alloy
Advanced Materials Research, 2010The hot deformation behavior of as-cast AZ31 magnesium alloys have been investigated at 200~400°C and strain rates 0.001~1s-1 by means of hot compression tests on a Gleeble-1500D thermal-mechanical simulator. We have analyzed the flow stress-strain curve and presented the constitutive equation by calculating stress exponent, activation energy and Zemer-
Shu Li Sun +4 more
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Hot Deformation Characterization of Haynes-242
Materials Today: Proceedings, 2018Abstract Ni-based super alloys are metallic materials with exceptional combinations of creep and oxidation resistance at high temperatures. Wrought alloys are hot formed at high temperatures and subsequently annealed and aged. The final mechanical properties of the alloys are a combination of the grain size generated during the process and the ...
V. Gaurav +2 more
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Deformation theory of hot-pressing
2011The possible deformation behaviour of spheres in a compact has been theoretically analyzed and experimentally verified. The change in contact area radius 'a' relative to the particle radius R has been related to the bulk density and bulk strain for four possible modes of packing: simple cubic (Z = 6), orthorhombic (Z = 8), rhombohedral (Z = 12), and ...
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Hot Deformation Behavior of GCr15 Steel
Journal of Iron and Steel Research International, 2013Hot deformation behavior of GCr15 (ASTM 52100) steel was investigated using single-hit compression tests on Gleeble-1500 simulator at the temperature range of 850–1100 °C and strain rate range of 0.1–10 s−1. The flow stress constitutive equation of GCr15 steel during hot deformation was determined by stress-strain curves analysis on the basis of the ...
Ning-qi Peng +3 more
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Hot deformation behaviour of 7075 alloy
Journal of Alloys and Compounds, 2011Abstract The hot deformation behaviour of Stir cast 7075 alloy was studied using processing map technique. The map has been interpreted in terms of the microstructural processes occurring in situ with deformation, based on the values of a dimensionless parameter η which is an efficiency index of energy dissipation through microstructural processes ...
M. Rajamuthamilselvan, S. Ramanathan
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Hot deformation behavior of FGH96 superalloys
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material, 2006Abstract The hot deformation behavior of FGH96 superalloys at 1070–1170°C and 5×10−4-2×10−1 s−1 were investigated by means of the isothermal compression tests at a Gleeble-1500 thermal mechanical simulator. The results show that dynamic recovery acts as the main softening mechanism below 2×10−3 s−1 whereas dynamic recrystallization acts as the main ...
Jiantao Liu +5 more
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Hot Deformation Behavior and Hot Processing Map of P92 Steel
Advanced Materials Research, 2010Hot-compression and hot-tension experiments were conducted on a Gleeble-1500D thermal-mechanical simulator. The constitutive equation was presented by calculating the stress exponent, activation energy and Zemer-Hollomon parameter during the hot compression.
Shu Li Sun, Min Gang Zhang, Wen Wu He
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Hot deformation‐enhanced globularization of pearlite
Steel Research, 1988A plain high‐carbon steel (0.74% C) was used to study the globularization (spheroidization and coalescence) of pearlite. In order to induce and/or enhance this process, specimens were deformed in the temperature range of austenite‐to‐pearlite transformation.
Radko Kaspar +2 more
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Hot deformation characteristics of 34CrMo4 steel
Journal of Iron and Steel Research International, 2010The 34CrMo4 (AISI 4130) steel is extensively utilized in the compressed natural gas cylinders. Due to the importance of thermomechanical processing in the production of these cylinders, the dynamic recrystallization (DRX) characteristics of 34CrMo4 steel were investigated.
S. V. Sajadi Far +2 more
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