Phase Transformations in Cold Rolled Polyoxymethylene

1972 ◽  
Vol 236 (65) ◽  
pp. 60-61 ◽  
Author(s):  
J. E. PREEDY ◽  
E. J. WHEELER
Keyword(s):  
Phase Transformations ◽  
Cold Rolled

scholarly journals Inhomogeneity of Phase Transformations β→ω and β→α in the Quenched Cold-Rolled Alloy Zr-20 %Nb

1996 ◽  
Vol 06 (C1) ◽  
pp. C1-149-C1-156 ◽  
Author(s):  
Yu. Perlovich ◽  
H. J. Bunge ◽  
V. Fesenko ◽  
M. Isaenkova ◽  
N. J. Park ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Cold Rolled

‘Flash’ Annealing in a Cold-Rolled Low Carbon Steel Alloyed With Cr, Mn, Mo, and Nb: Part I - Continuous Phase Transformations

2018 ◽  
Vol 90 (1) ◽  
pp. 1800098 ◽  
Author(s):  
Felipe Manuel Castro Cerda ◽  
Florian Vercruysse ◽  
Constantinos Goulas ◽  
Bernd Schulz ◽  
Roumen H. Petrov
Keyword(s):  
Carbon Steel ◽  
Phase Transformations ◽  
Low Carbon Steel ◽  
Continuous Phase ◽  
Low Carbon ◽  
Flash Annealing ◽  
Cold Rolled

scholarly journals Features of the Phase Transformations in Sheets, Tubes and Welding Seams of the Alloy Zr–2.5%Nb

1997 ◽  
Vol 30 (1-2) ◽  
pp. 55-70 ◽  
Author(s):  
M. Isaenkova ◽  
Yu. Perlovich
Keyword(s):  
Phase Transformation ◽  
Phase Transformations ◽  
Strain Hardening ◽  
Arc Welding ◽  
Melting Zone ◽  
Main Attention ◽  
Tangential Stresses ◽  
Cold Rolled ◽  
Characteristic Features ◽  
Thermal Influence

By use of X-ray texture analysis characteristic features of phase transformations in sheets, tubes and welding seams of the Zr–2.5%Nb alloy were studied. Main attention was given to inhomogeneity of phase transformation development, connected with inhomogeneous distribution of strain hardening in grains with different crystallographic orientations. The typical manifestation of phase transformation inhomogeneity in cold-rolled sheets is a shift of the initial texture maximum to the region of increased strain hardening. In channel tubes in consequence of phase transformations α−β−α the texture component {112−0}〈101−0〉 gains, testifying that tangential stresses favour corresponding alignment of basal normals accompanied by absorption of grains with other orientations. Competition between recrystallization and phase transformation in conditions of heating was considered. As strain hardening increases, recrystallization prior to phase transformation becomes more probable, being predominant within α-grains of some orientations. Parallel development of recrystallization and phase transformation in the zone of thermal influence by arc welding of rolled sheets was considered. It was shown that, as the distance from the melting zone decreases, different combinations of these processes realize.

Phase transformations in commercial cold-rolled Al–Zn–Mg–Cu alloys with Sc and Zr addition

2020 ◽  
Author(s):  
V. Kodetová ◽  
M. Vlach ◽  
H. Kudrnová ◽  
J. Málek ◽  
M. Cieslar ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Cu Alloys ◽  
Zr Addition ◽  
Cold Rolled

Phase transformations in non-isothermally annealed as-cast and cold-rolled AlMnScZr alloys

2012 ◽  
Vol 103 (7) ◽  
pp. 814-820 ◽  
Author(s):  
Martin Vlach ◽  
Ivana Stulíková ◽  
Bohumil Smola ◽  
Hana Císarová ◽  
Jaroslava Piešová ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Cold Rolled

Phase Transformations and Recrystallization in Cold-Rolled Al–Mn, Al–Sc–Zr and Al–Mn–Sc–Zr Alloy

2014 ◽  
Vol 354 ◽  
pp. 93-100
Author(s):  
Martin Vlach ◽  
Ivana Stulíková ◽  
Bohumil Smola ◽  
Hana Kudrnova ◽  
Tomáš Kekule ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Phase Transformations ◽  
Isothermal Annealing ◽  
Electron Backscatter Diffraction ◽  
Deformation Degree ◽  
Mechanical And Electrical Properties ◽  
Cold Rolled ◽  
Backscatter Diffraction ◽  
Zr Alloy ◽  
Subsequent Isothermal Annealing

The effect of cold-rolling on mechanical and electrical properties, microstructure and recrystallization behaviour of the AlMn, AlScZr and AlMnScZr alloys was studied. The materials were investigated during isothermal annealing at 300, 400, 500 and 550°C and during step-by-step quasilinear annealing from 200°C up to 600°C with a heating rate of 100 K/h followed by subsequent isothermal annealing at 600°C/5 h. Precipitation reactions were studied by electrical resistometry and (micro) hardness measurements. The microstructure development was investigated by electron microscopy and electron backscatter diffraction examinations. The hardening effect is due to uniformly distributed Al3Sc and/or Al3(Sc,Zr) particles. The distinct changes in resistivity of the alloys above ∼ 300°C are mainly caused by precipitation of Mn-containing particles. It has a negligible effect on hardness. Phase transformations in the AlMn and AlMnScZr alloys are highly enhanced by cold rolling. The precipitation is dependent on the deformation degree – the more deformation the more intensive precipitation of the Mn-containing particles. The combination of Mn, Sc and Zr additions to Al substantially suppresses recrystallization at 550°C. A partial recrystallization was observed in the AlScZr alloy and AlMnScZr alloy after annealing 550°C/60 min and 550°C/760 min, respectively. The decomposition sequence of the supersaturated solid solution of the AlMnScZr alloy is compatible with the decomposition sequence of the AlScZr system accompanied and/or followed by the formation of Mn-containing particles.

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