STATIC RECRYSTALLIZATION AFTER HOT WORKING OF Al-Li ALLOYS

1987 ◽  
Vol 48 (C3) ◽  
pp. C3-171-C3-177 ◽  
Author(s):  
M. GONÇALVES ◽  
C. M. SELLARS
Keyword(s):  
Static Recrystallization ◽  
Hot Working

A Step Forward in the Understanding of the Strain Reversal Effect on the Recrystallization Kinetics after Hot Working

2012 ◽  
Vol 715-716 ◽  
pp. 643-648
Author(s):  
D. Jorge-Badiola ◽  
J.L. Lanzagorta ◽  
Isabel Gutiérrez
Keyword(s):  
Strain Path ◽  
Static Recrystallization ◽  
Equivalent Strain ◽  
Hot Working ◽  
Material Behaviour ◽  
Reversal Effect ◽  
Recrystallization Kinetics ◽  
Strain Axis ◽  
Strain Reversal ◽  
Strain Transients

A reversion of the strain produces a modification of the static recrystallization kinetics. Initially, the reversion increases the recrystallization time, that reaches a maximum at a certain strain, and decreases again for increasing reverse strains. This transient on recrystallization kinetics develops over a strain interval similar to that of the microstructural and stress-strain transients. At strains beyond the transient, the reversion can be regarded as a shift on the strain axis. However, at the authors knowledge there is no formulation able to describe the material behaviour during the transient. The present work introduces an equivalent strain concept based on the substructural dissolution/build-up processes taking place as a result of the strain reversal. This formulation allows including the effect of the strain path on recrystallization models.

Kinetics for static recrystallization after hot working of 0.38C-0.99Cr-0.16Mo steel

2004 ◽  
Vol 11 (4) ◽  
pp. 353-357 ◽  
Author(s):  
Xiong Li ◽  
Hong-bing Zhang ◽  
Xue-yu Ruan ◽  
Zhong-hua Luo ◽  
Yan Zhang
Keyword(s):  
Static Recrystallization ◽  
Hot Working

Static Recrystallization of Tool Steels

2007 ◽  
Vol 539-543 ◽  
pp. 4458-4463 ◽  
Author(s):  
C.A.C. Imbert ◽  
H.J. McQueen
Keyword(s):  
Carbon Steel ◽  
Single Phase ◽  
Static Recrystallization ◽  
Austenitic Stainless Steels ◽  
Hot Working ◽  
Microalloyed Steels ◽  
Tool Steels ◽  
High Alloy ◽  
Alloy Tool ◽  
Static Softening

Double-twist torsion tests were used to determine static softening in the hot working range of three tool steels – W1, a carbon steel (1.03% C - 0.8% other elements), A2 and D2, a medium and a high alloy steel, containing 8.45% and 14.82% alloying elements. The carbon steel, that was single-phase austenite in the hot-working range, experienced rapid static recrystallization due to increased diffusion rate caused by C in hot austenite, very little alloying solute and no carbides. Carbides in alloy tool steels, which exist throughout the hot-working range, have a retarding effect on the progress of recrystallization but are responsible for enhancing initiation due to formation of nuclei at the strain concentration near the particle/matrix interface. Static recrystallization (SRX) of the alloy tool steels was compared with austenitic stainless steels, with similar strengths but much greater alloying content, and with microalloyed steels, as well as with the dynamic recrystallization kinetics.

Effect of the Strain Reversal on the Microstructure and the Recrystallization Kinetics of the Austenite

2004 ◽  
Vol 467-470 ◽  
pp. 275-280 ◽  
Author(s):  
D. Jorge-Badiola ◽  
Amaia Iza-Mendia ◽  
Isabel Gutiérrez
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Static Recrystallization ◽  
Microalloyed Steel ◽  
Hot Working ◽  
Recrystallization Kinetics ◽  
Static Softening ◽  
Nb Microalloyed Steel ◽  
Strain Reversal ◽  
Kinetics Of

It has been demonstrated recently that when a reversion of the strain is applied during the hot working of a Nb-microalloyed steel, the subsequent static recrystallization kinetics is significantly affected. However, depending on the magnitude of the reversion, the static softening kinetics can be accelerated or delayed. This relates to the substructure dissolution taking place by the effect of the reversal. In the present work, new microstructural results obtained by EBSD on an austenitic stainless steel hot deformed by torsion is used to explain better the observed effect of the reversion of the strain.

Observations of dislocation interactions with recrystallized grain boundaries

1988 ◽  
Vol 46 ◽  
pp. 628-629
Author(s):  
C. W. Price
Keyword(s):  
Dislocation Density ◽  
Grain Boundary ◽  
Strain Rate ◽  
Grain Boundaries ◽  
Dislocation Structure ◽  
Hot Deformation ◽  
Static Recrystallization ◽  
High Dislocation Density ◽  
High Angle ◽  
Dislocation Interactions

Little evidence exists on the interaction of individual dislocations with recrystallized grain boundaries, primarily because of the severely overlapping contrast of the high dislocation density usually present during recrystallization. Interesting evidence of such interaction, Fig. 1, was discovered during examination of some old work on the hot deformation of Al-4.64 Cu. The specimen was deformed in a programmable thermomechanical instrument at 527 C and a strain rate of 25 cm/cm/s to a strain of 0.7. Static recrystallization occurred during a post anneal of 23 s also at 527 C. The figure shows evidence of dissociation of a subboundary at an intersection with a recrystallized high-angle grain boundary. At least one set of dislocations appears to be out of contrast in Fig. 1, and a grainboundary precipitate also is visible. Unfortunately, only subgrain sizes were of interest at the time the micrograph was recorded, and no attempt was made to analyze the dislocation structure.

DILLIDUR 450V

Alloy Digest ◽  
2011 ◽  
Vol 60 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Room Temperature ◽  
Surface Hardness ◽  
Heat Treating ◽  
Hot Working ◽  
Resistant Steel ◽  
Bend Strength

Abstract Dillidur 450V is a water hardened wear-resistant steel with surface hardness at room temperature of 420-480 HB. The steel is easy to weld and bend. Hot working is not recommended. This datasheet provides information on composition, physical properties, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on wear resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-638. Producer or source: Dillinger Hütte GTS.

Sign in / Sign up

Export Citation Format

Share Document