Effect of Grain Size and Residual Strain on the Dynamic Transformation of Austenite under Plate Rolling Conditions

被引：11
作者：
Rodrigues, Samuel F. [1 ,2 ]
Aranas, Clodualdo, Jr. [1 ]
Sun, Binhan [1 ]
Siciliano, Fulvio [3 ]
Yue, Stephen [1 ]
Jonas, John J. [1 ]
机构：
[1] McGill Univ, Dept Mat Engn, Wong Bldg,3610 Univ St, Montreal, PQ H3A 2B2, Canada
[2] Fed Inst Educ Sci & Technol Maranhao IFMA, Ave Colares Moreira 477, BR-65075441 Sao Luis, MA, Brazil
[3] Dynam Syst Inc, 323 NY 355, Poestenkill, NY 12140 USA
来源：
STEEL RESEARCH INTERNATIONAL | 2018年 / 89卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Dynamic transformation; Grain size; Roughing passes; X70; steel; LOW-CARBON STEEL; FERRITE TRANSFORMATION; DEFORMED AUSTENITE; WIDMANSTATTEN FERRITE; HOT DEFORMATION; NB STEEL; TEMPERATURES; AE(3); EVOLUTION; BEHAVIOR;
D O I：
10.1002/srin.201700547
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
When austenite is deformed within the austenite phase field, that is, above the equilibrium transformation temperature Ae(3), it partially transforms dynamically into ferrite. Here, rough rolling simulations are conducted at 1100 degrees C on an X70 steel to study the influence of grain size and residual strain on this type of transformation. Three simulated roughing passes are applied with pass strains of 0.4 at a strain rate of 1.0 s(-1). The resulting stress-strain curves are recorded and analyzed. The volume fractions of ferrite and martensite (prior austenite) are determined on quenched samples by means of metallographic techniques. It is observed that dynamic transformation took place during the first roughing pass and that the volume fraction of transformed ferrite increases with the cumulative strain. Both the critical strain to the onset of dynamic transformation as well as the grain size decrease with pass number.
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页数：7
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