Effect of Stress Relaxation Aging on Precipitation Kinetics of Al–Cu–Li Alloy

2022 ◽  
Author(s):  
Hailong Liao ◽  
Lihua Zhan ◽  
Feng Xia ◽  
Minghui Huang ◽  
Chunhui Liu
Keyword(s):  
Stress Relaxation ◽  
Precipitation Kinetics ◽  
Kinetics Of

Influence of Boron on the Precipitation Kinetics in Advanced Ultra-High Strength Steels

2015 ◽  
Vol 1765 ◽  
pp. 91-96
Author(s):  
G. Altamirano ◽  
I. Mejía ◽  
A. Hernández-Expósito ◽  
J.M. Cabrera
Keyword(s):  
Stress Relaxation ◽  
High Strength Steels ◽  
High Strength ◽  
Relaxation Method ◽  
Low Carbon ◽  
Precipitation Kinetics ◽  
Austenite Recrystallization ◽  
Ultra High Strength Steels ◽  
Relaxation Curves ◽  
Kinetics Of

ABSTRACTIn the present work, the stress relaxation method was employed to determine the influence of B addition on the kinetics of strain-induced precipitation and its interaction with the static austenite recrystallization. For this purpose, the behavior of two low carbon advanced ultra-high strength steels was analyzed during stress relaxation tests at different temperatures and constant pre-strain rate. The precipitation start (Ps) and finish (Pf) times were determined from the relaxation curves and then the corresponding precipitation-time-temperature diagrams were constructed for each steel. Transmission Electron Microscopy was used to determine the chemical nature and evolution of precipitation. In general, the results show that the addition of B retards the austenite recrystallization, tends to accelerate the precipitation kinetics of carbonitrides and leads to a finer and denser distribution of precipitates. These results are discussed in terms of the driving force for the nucleation of precipitation, which in turn is controlled by the degree of supersaturation of microalloying element and as a function of B segregation and B-vacancy complexes to dislocations and grain boundaries.

A Review of the Stress-Relaxation Method for Following the Kinetics of Precipitation, Recovery and Recrystallization

2012 ◽  
Vol 706-709 ◽  
pp. 2758-2763 ◽  
Author(s):  
W.J. Liu
Keyword(s):  
Stress Relaxation ◽  
Relaxation Rate ◽  
Relaxation Method ◽  
Dislocation Model ◽  
Precipitation Kinetics ◽  
Kinetics Of Precipitation ◽  
Kinetics Of

Stress-relaxation method was first used by Liu and Jonas in 1980s for following the kinetics of strain induced precipitation of carbonitrides in austenite. Since then, the method has been widely employed for studying not only the precipitation kinetics but also the recovery and recrystallization processes in steels and other alloys. In the present paper, the principle and the worldwide usage of the method were reviewed. The dependence of stress relaxation rate on the occurrence of precipitation, recovery and recrystallization was interpreted based on a dislocation model. The capabilities and the limitations of the method were discussed and ways to overcome the existing limitations were also proposed.

Effect of ECAP Processing on Hardness, Electrical Conductivity, and Precipitation Kinetics of the Cu-0.81Cr-0.07Zr Alloy

2021 ◽  
Author(s):  
Filipe Caldatto Dalan ◽  
Gisele Ferreira de Lima Andreani ◽  
Dilermando Nagle Travessa ◽  
Svetlana Faizova ◽  
Ilshat Albertovich Faizov ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Precipitation Kinetics ◽  
Ecap Processing ◽  
Kinetics Of

Influence of the degree of scandium supersaturation on the precipitation kinetics of rapidly solidified Al-Mg-Sc-Zr alloys

2016 ◽  
Vol 117 ◽  
pp. 43-50 ◽  
Author(s):  
J. Taendl ◽  
A. Orthacker ◽  
H. Amenitsch ◽  
G. Kothleitner ◽  
C. Poletti
Keyword(s):  
Precipitation Kinetics ◽  
Rapidly Solidified ◽  
Kinetics Of ◽  
Zr Alloys

A DSC study on the precipitation kinetics of cryorolled Al 6063 alloy

2010 ◽  
Vol 122 (1) ◽  
pp. 188-193 ◽  
Author(s):  
S.K. Panigrahi ◽  
R. Jayaganthan ◽  
V. Pancholi ◽  
Manoj Gupta
Keyword(s):  
Precipitation Kinetics ◽  
Kinetics Of
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