Integrated modelling of thermal cycles, austenite formation, grain growth and decomposition in the heat affected zone of carbon steel

2005 ◽  
Vol 10 (5) ◽  
pp. 574-582 ◽  
Author(s):  
W. Zhang ◽  
J. W. Elmer ◽  
T. DebRoy
Keyword(s):  
Carbon Steel ◽  
Grain Growth ◽  
Heat Affected Zone ◽  
Integrated Modelling ◽  
Austenite Formation ◽  
Thermal Cycles

Austenite Grain Growth in Heat Affected Zone of Zr-Ti Bearing Microalloyed Steel

2012 ◽  
Vol 19 (2) ◽  
pp. 73-78 ◽  
Author(s):  
Lei Zheng ◽  
Ze-xi Yuan ◽  
Shen-hua Song ◽  
Tian-hui Xi ◽  
Qian Wang
Keyword(s):  
Grain Growth ◽  
Heat Affected Zone ◽  
Microalloyed Steel ◽  
Austenite Grain ◽  
Austenite Grain Growth

In-Situ Laser Ultrasound Measurements of Austenitic Grain Growth in Plain Carbon Steel

2021 ◽  
Author(s):  
Christian Kerschbaummayr ◽  
Martin Ryzy ◽  
Bernhard Reitinger ◽  
Mike Hettich ◽  
Jan Džugan ◽  
...  
Keyword(s):  
Grain Size ◽  
Carbon Steel ◽  
Grain Growth ◽  
Plain Carbon Steel ◽  
Ex Situ ◽  
Ultrasound Measurement ◽  
Laser Ultrasound ◽  
Austenite Grain Size ◽  
Ultrasound Measurements

Abstract The macroscopic mechanical properties like yield-strength, ductility or hardness play an important role during the steel production and the design of new steel grades. The austenite grain size is an important parameter, which influences the final microstructure and the properties of a material. When developing grain growth evolution models, typically many samples have to be treated thermally and micrographs have to be prepared ex-situ. To reduce the time expenditure of this procedure we carried out in-situ laser ultrasound measurements of austenitic grain growth in plain carbon steel (AISI 1045). A thermomechanical simulator of the type Linseis L78/RITA has been upgraded with a laser ultrasound measurement system, which enables the continuous and contactless determination of the austenite mean grain size during a thermal cycle. In this work we will show the calibration workflow and grain size results by a new attenuation model for plain carbon steel. In-situ laser ultrasound measurement data is compared with several micrographs defined at supporting points along a specified temperature program to corroborate the findings.

Austenite in Steel

2015 ◽  
pp. 133-162
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Hot Deformation ◽  
Parent Phase ◽  
Austenite Formation ◽  
Processing Conditions ◽  
Austenitic Grain Size

Austenite is the key to the versatility of steel and the controllable nature of its properties. It is the parent phase of pearlite, martensite, bainite, and ferrite. This chapter discusses the importance of austenite, beginning with the influence of austenitic grain size and how to accurately measure it. It then describes the principles of austenite formation and grain growth and examines several time-temperature-austenitizing diagrams representing various alloying and processing conditions. The chapter concludes with a discussion on hot deformation and subsequent recrystallization.

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