scholarly journals The Influence of Austenite Grain Size on the Mechanical Properties of Low-Alloy Steel with Boron

Metals ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 26 ◽  
Author(s):  
Beata Białobrzeska ◽  
Łukasz Konat ◽  
Robert Jasiński
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Alloy Steel ◽  
Low Alloy Steel ◽  
Austenite Grain Size ◽  
Austenite Grain

The Effect of B and Microalloying Elements (V, Ti, Nb) Additions on the Austenite Grain Growth of Low Alloy Steel

2013 ◽  
Vol 197 ◽  
pp. 25-32
Author(s):  
Henryk Adrian ◽  
Marta Pelczar ◽  
Anna Adrian ◽  
Joanna Augustyn-Pieniążek
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Alloy Steel ◽  
Growth Inhibitor ◽  
Vanadium Content ◽  
Low Alloy Steel ◽  
Austenite Grain Size ◽  
Austenite Grain ◽  
Austenite Grains ◽  
Austenite Grain Growth

The effect of B and microalloying additions of V, V+Ti, V+Nb on austenite grain growth of low alloy steel containing 0.3% C, 1 % Cr and 0.2 % Mo was investigated. As a measure of austenite grain size the mean chord length of austenite grains was assumed. The boron content in investigated steel was in the range of 0 to 0.008 %. The investigations were carried out in austenitising temperature range of 850 to 1100oC. Using the thermodynamic model the contents of undissolved compounds of carbonitride V(C,N) and boron nitride BN were calculated and the effect of undissolved compounds content on austenite grain size was investigated. Obtained results showed, that vanadium content below 0.1 % was ineffective as austenite grain growth inhibitor of boron containing steel and austenite grain size of steel was higher compare to non-alloyed steel. The most effective for decreasing of austenite grains size of boron containing steel was addition of 0.18 % V + 0.03 % Nb

Effect of Austenite Grain Size on Martensitic Transformation of a Low Alloy Steel

2005 ◽  
Vol 475-479 ◽  
pp. 3169-3172 ◽  
Author(s):  
Seok Jae Lee ◽  
Young Kook Lee
Keyword(s):  
Grain Size ◽  
Martensitic Transformation ◽  
Alloy Steel ◽  
Martensite Transformation ◽  
Low Alloy Steels ◽  
Low Alloy Steel ◽  
Transformation Kinetics ◽  
Austenite Grain Size ◽  
Kinetics Models ◽  
Austenite Grain

There are many empirical equations for predicting martensite start temperature (Ms) and the kinetics models of martensitic transformation of plain carbon and low alloy steels. The Ms temperature equations are only dependent upon the chemistry, while the martensite transformation kinetics models are based on the degree of undercooling below Ms temperature. However, the prior austenite grain size (AGS) is also expected to influence both Ms temperature and martensite transformation kinetics as it does in diffusive transformations. In this study, herefore, both Ms temperature and martensite transformation kinetics of a low alloy steel with different austenite grain sizes were investigated using a dilatometer. The new Ms equation and martensite transformation kinetics model including the AGS effect are proposed.

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