Recrystallisation and grain growth in hot working of steels

2012 ◽  
pp. 67-113 ◽  
Author(s):  
B. López ◽  
J.M. Rodriguez-Ibabe
Keyword(s):  
Grain Growth ◽  
Hot Working

Influence of hot working conditions on grain growth behavior of Alloy 718

2016 ◽  
pp. 609-617 ◽  
Author(s):  
Chuya Aoki ◽  
Tomonori Ueno ◽  
Takehiro Ohno
Keyword(s):  
Grain Growth ◽  
Working Conditions ◽  
Growth Behavior ◽  
Hot Working ◽  
Alloy 718 ◽  
Grain Growth Behavior

Recrystallization and Grain Growth Behavior of Alloy 718 Casting during Hot Working

2007 ◽  
pp. 57-60
Author(s):  
Jong Won Yoon ◽  
Nam Yong Kim ◽  
Jeoung Han Kim ◽  
Jong Taek Yeom ◽  
Nho Kwang Park
Keyword(s):  
Grain Growth ◽  
Growth Behavior ◽  
Hot Working ◽  
Alloy 718 ◽  
Grain Growth Behavior

MODELING AND SIMULATION OF DYNAMIC RECRYSTALLIZATION AND GRAIN GROWTH DURING HOT WORKING OF INCONEL 783 SUPERALLOY

2010 ◽  
Vol 17 (01) ◽  
pp. 105-109 ◽  
Author(s):  
JONG-TAEK YEOM ◽  
EUN JEOUNG JUNG ◽  
JEE HOON KIM ◽  
JEOUNG HAN KIM ◽  
JAE-KEUN HONG ◽  
...  
Keyword(s):  
Grain Growth ◽  
Compression Test ◽  
Microstructure Evolution ◽  
Optimization Technique ◽  
Hot Compression ◽  
Hot Working ◽  
Least Square ◽  
Isothermal Heat Treatment ◽  
Compression Tests ◽  
Hot Compression Test

In this study, the modeling of recrystallization and grain growth was investigated to predict the microstructure evolution during hot working of INCONEL 783 superalloy (Alloy 783). The recrystallization model was constructed on the basis of the Avrami formation. A least-square optimization technique was used to determine several important parameters within the model from isothermal heat treatment and hot compression test results. High temperature compression tests were carried out under different temperatures, strain rates and strain conditions. The model for describing the recrystallization and grain growth behaviors of Alloy 783 was implemented onto the user-subroutine of a commercial FE code. In order to demonstrate the reliability of the model, the microstructure evolution of Alloy 783 alloy during the hot compression test was simulated and was accorded well with the experimental results.

scholarly journals Austenite Grain-Growth After Hot Working (1st Report)

1950 ◽  
Vol 14 (12) ◽  
pp. 12-15
Author(s):  
Nobuo Takeda
Keyword(s):  
Grain Growth ◽  
Hot Working ◽  
Austenite Grain ◽  
Austenite Grain Growth

scholarly journals Austenite Grain-Growth After Hot Working. (2nd Report)

1951 ◽  
Vol 15 (3) ◽  
pp. 101-106
Author(s):  
Nabuo Takeda
Keyword(s):  
Grain Growth ◽  
Hot Working ◽  
Austenite Grain ◽  
Austenite Grain Growth

Modeling Microstructure Development during Hot Working of an Austenitic Stainless Steel

2013 ◽  
Vol 753 ◽  
pp. 423-426 ◽  
Author(s):  
Göran Engberg ◽  
Ida Kero ◽  
Karin Yvell
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Grain Growth ◽  
Solute Drag ◽  
Hot Working ◽  
Strain History ◽  
Model Parameters ◽  
Second Phase ◽  
Microstructure Development ◽  
Secondary Phases

A number of physically based models are combined in order to predict microstructure development during hot deformation. The models treat average values for the generation and recovery of vacancies and dislocations, recrystallization and grain growth and the dissolution and precipitation of second phase particles. The models are applied to a number of laboratory experiments made on 304 austenitic stainless steel and the model parameters are adjusted from those used for low alloyed steel mainly in order to obtain the right kinetics for the influence of solute drag on climb of dislocations and on grain growth. The thermodynamic data are obtained using Thermo-Calc© to create solubility products for the possible secondary phases. One case of wire rolling has been analyzed mainly concerning the evolution of recrystallization and grain size. The time, temperature and strain history has been derived using process information. The models are shown to give a fair description of the microstructure development during hot working of the studied austenitic stainless steel.

Influence of hot-working conditions on grain growth of superalloy 718

2019 ◽  
Vol 267 ◽  
pp. 26-33 ◽  
Author(s):  
Chuya Aoki ◽  
Tomonori Ueno ◽  
Takehiro Ohno ◽  
Katsunari Oikawa
Keyword(s):  
Grain Growth ◽  
Working Conditions ◽  
Hot Working

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

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