scholarly journals Austenitic Grain-Size

1960 ◽  
Vol 9 (83) ◽  
pp. 504-507
Author(s):  
A. Adachi
Keyword(s):  
Grain Size ◽  
Austenitic Grain Size

scholarly journals Effect of Added Elements, Especially Titanium, on the Coarsening Temperature of Austenitic Grain Size.

1963 ◽  
Vol 49 (6) ◽  
pp. 894-900 ◽  
Author(s):  
Akira ADACHI ◽  
Kiyoshi MIZUKAWA ◽  
Kakuo KANDA
Keyword(s):  
Grain Size ◽  
Austenitic Grain Size

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.

scholarly journals Relationship between martensitic plate size and austenitic grain size in martensitic transformations

2015 ◽  
Vol 106 (22) ◽  
pp. 221903 ◽  
Author(s):  
P. La Roca ◽  
L. Isola ◽  
Ph. Vermaut ◽  
J. Malarría
Keyword(s):  
Grain Size ◽  
Martensitic Transformations ◽  
Martensitic Plate ◽  
Plate Size ◽  
Austenitic Grain Size

Effect of Mean Grain Size in the Time of Flight for Lcr Waves

2012 ◽  
Author(s):  
Alexandre Aparecido Buenos ◽  
Auteliano Antunes dos Santos ◽  
Paulo Pereira ◽  
Cleudiane Soares Santos
Keyword(s):  
Grain Size ◽  
Time Of Flight ◽  
Heat Treating ◽  
Ultrasonic Methods ◽  
Mean Grain Size ◽  
Bulk Waves ◽  
Different Temperatures ◽  
A36 Steel ◽  
The Mean ◽  
Austenitic Grain Size

The ultrasonic methods are widely used for evaluation of materials for its inexpensive and practical features. Among the largely used ultrasonic methods is the Critically Refracted Longitudinal Waves (Lcr), which applies longitudinal bulk waves travelling right below the surface, parallel to it. The method can be used to measure stresses near the surface through acoustoelasticity. However, the materials microstructure directly influences the propagation of these waves. The mean grain size is one of the factors that affect the wave speed. The purpose of this paper is to evaluate the effect of mean austenitic grain size in the time of flight (TOF) of Lcr wave. Samples (CDPs) of ASTM A36 steel were manufactured with dimensions of 5/8″ × 6″ × 12″. These were submitted to heat treating at the different temperatures ranges and cooled in air to generate different grain sizes. The results were compared to the grain size estimated in the literature and obtained from optical microscopy. The study showed a clear dependence of TOF on mean austenitic grain size for ASTM A36 steel. Such effect has to be studied to allow stress measurements with Lcr waves.

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