Abstract The growth kinetics of ferrite formed at intragranular inclusions and
austenite grain boundaries in a low carbon microalloyed steel were
analyzed by optical
observation and theoretical calculation. The formation of intragranular
ferrite on inclusions was later than that of ferrite allotriomorphs at
austenite grain boundaries within the temperature range of 650-750℃.
The undercooling for the formation of ferrite on inclusions
is 40℃ larger than that at austenite grain
boundaries. For the former the measured
growth rate constant was smaller than that calculated, and for the
latter the measured growth rate constant was
larger than that calculated.
[1] Mabuchi H, Uemori R, Fujioka M. ISIJ Int, 1996; 36: 80 [2] Gregg J M, Badeshia H K D H. Ada Mater, 1997; 45: 739 [3] Shim J-H, Cho Y W, Chung S H, Shim J-D, Lee D N. Acta Mater, 1999; 47: 2751 [4] Shim J-H, Oh Y-J, Suh J Y, Cho Y W, Shim J-D, Byun J-S, Lee D N. Acta Mater, 2001; 49: 2115 [5] Zhang S, Hattori N, Enomoto M, Tarui T. ISIJ Int, 1996; 36: 1301 [6] Lee T-K, Kim H-J, Kang B J, Hwang S K. ISIJ Int, 2000; 40: 1260 [7] Madariaga I, Romero S L, Gutierrez I. Metall Mater Trans, 1998; 29A: 1003 [8] Jones S J, Badeshia H K D H. Metall Mater Trans, 1997; 28A: 2005 [9] Bhadeshia H K D H. Bainite in Steels. 2nd edition, London, UK: IOM Comunications Ltd, 2001: 241 [10] Wu K M, Li Z G, He X L, Zhang L Q, Fang A H. ISIJ Int, 2006; 46: 161 [11] Kinsman K R, Aaronson H I. Metall Trans, 1973; 4: 959 [12] Atkinson C, Aaron H B, Kinsman K R, Aaronson H I. Metall Trans, 1973; 4: 783 [13] Bradley J R, Rigsbee J M, Aaronson H I. Metall Trans, 1977; 8A: 323 [14] Bradley J R, Aaronson H I, Russell K C, Johnson W C. Metall Trans, 1977; 8A: 1955 [15] Bradley J R, Aaronson H I. Metall Trans, 1981; 12A: 1729 [16] Shiflet G J, Aaronson H I. Metall Trans, 1990; 21A: 1413 [17] He K, Edmonds D V. Mater Sci Technol, 2002; 18: 289 [18] Zener C J. Appl Phys, 1949; 20: 950 [19] Foo E H, Lupis C H P. Acta Metall, 1973; 21: 1409 [20] Enomoto M, Aaronson H I. CALPHAD, 1985; 9: 43 [21] Tanaka T, Aaronson H I, Enomoto M. Metall Mater Trans, 1995; 26A: 535 [22] Enomoto M. Phase Transformations in Metals. Tokyo: Uchida Rokakuho Publishing Co. Ltd, 2000: 251 [23] Sekerka R F, Wang S L. In: Aaronson H I ed., Lectures on the Theory of Phase Transformations, Warrendale, PA: TMS-AIME, 1999: 231 [24] Enomoto M. Phase Transformations in Metals. Tokyo: Uchida Rokakuho Publishing Co. Ltd, 2000: 74 [25] Aaron H B, Aaronson H I. Acta Metall, 1968; 16: 789 [26] Ricks R A, Howell P R, Barritte G S. J Mater Sci, 1982; 17: 732 [27] Boswell P G., Kinsman K R, Shiflet G J, Aaronson H I. Mechanical Properties and Phase Transformations in Engineering Materials, TMS Annual Meeting in New Orleans Louisiana, Warrendale, PA: AIME, 1986: 445 [28] Kinsman K R, Aaronson H I. Transformation and Hard-enability in Steels, Ann Arbor, Michigan: Climax Molybdenum Co., 1967: 39 [29] Ramasubrananian P V, Stein D F. Metall Trans, 1973; 4: 1735 [30] Bradley J R, Aaronson H I, Russell K C, Johnson W C. Metall Trans, 1977; 8A: 19555
