Acta Metall Sin  2011, Vol. 47 Issue (8): 1046-1054    DOI: 10.3724/SP.J.1037.2011.00089

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MICROSTRUCTURAL CHARACTERS AND TOUGHNESS OF DIFFERENT SUB–REGIONS IN THE WELDING HEAT AFFECTED ZONE OF LOW CARBON BAINITIC STEEL

LAN Liangyun 1, QIU Chunlin 1, ZHAO Dewen 1, LI Canming 1,2, GAO Xiuhua 1, DU Linxiu 1

1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819 2. Technical Research and Development Center, Laiwu Steel Group, Laiwu 271104

LAN Liangyun QIU Chunlin ZHAO Dewen LI Canming GAO Xiuhua DU Linxiu. MICROSTRUCTURAL CHARACTERS AND TOUGHNESS OF DIFFERENT SUB–REGIONS IN THE WELDING HEAT AFFECTED ZONE OF LOW CARBON BAINITIC STEEL. Acta Metall Sin, 2011, 47(8): 1046-1054.

Abstract References Related Articles Recommended Metrics Download:  PDF(1321KB)  Export:  BibTeX | EndNote (RIS)       Abstract  It is generally recognized that welding heat affected zone (WHAZ) is the poorest toughness region in the welded joint of low carbon bainitic steels. The thermomechanical simulator was employed to simulate the welding thermal cycle processes of different sub–regions in WHAZ of low carbon bainitic steel in this work. The toughness of simulated specimens were tested on the instrumented drop weight impact tester with oscilloscope, and miscrostructure features were observed by means of OM, SEM, TEM and EBSD. The results showed that when cooling time (t8/5) was 30 s, the crack initiation energy of various sub–regions was similar, and the range of their values was between 40 and 70 J. However, fine grained heat affected zone (FGHAZ) exhibited excellent crack arrest properties because the impact load–time curve included wide crack ductile propagation and crack brittle propagation stages. By contrast, the crack propagation energy of intercritical heat affected zone (ICHAZ) and coarse grained heat affected zone (CGHAZ) obviously deteriorated. With the increase in cooling time, both crack initiation energy and crack propagation energy of various sub–regions decreased, in which the crack initiation energy of CGHAZ and the crack propagation energy of FGHAZ decreased notably. Under different cooling rates, the variation of morphology and size of M–A constituents was mainly responsible for the deterioration of crack initiation energy. As for crack propagation energy, the FGHAZ had a good resistance to crack propagation due to high density of high angle grain boundary. Therefore, its crack propagation energy was far superior to other sub–regions. There was uneven effective grain size in the ICHAZ and ferrite grain grew with the decease in cooling rate, which decreased the crack propagation energy. In the CGHAZ, prior austenite grains coarsened and the density of high angle grain boundaries decreased greatly, which resulted in the decrease in crack propagation energy. Key words:  low carbon bainitic steel      heat affected zone      impact toughness      M–A constituent      high angle grain boundary      Received:  25 February 2011      Fund:  Supported by National Natural Science Foundation of China (No.51074052) and Fundamental Research Funds for the Central Universities (No.100607001) Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors LAN Liang-Yun QIU Chun-Lin DIAO De-Wen LI Can-Meng GAO Xiu-Hua DU Lin-Xiu URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00089     OR     https://www.ams.org.cn/EN/Y2011/V47/I8/1046 [1] Shanmugam S, Ramisetti N K, Misra R D K, Hartmann J, Jansto S G. Mater Sci Eng, 2008; A478: 26 [2] Yao L D, Zhao X T, Zhao S X. US Pat, 0032062Al, 2010 [3] Shome M, Gupta O P, Mohanty O N. Metall Mater Trans, 2004; 35A: 985 [4] Li C, Wang Y, Han T, Han B, Li L. J Mater Sci, 2011; 46: 727 [5] Chen J H, Kikuta Y, Araki T, Yoneda M, Matsuda Y. Acta Metall, 1984; 32: 1779 [6] Li Y, Crowther D N, Green M J W, Mitchell P S, Baker T N. ISIJ Int, 2001; 41: 46 [7] Sawai T, Wakoh M, Ueshima Y, Mizoguchi S. ISIJ Int, 1992; 32: 169 [8] Kojima A, Kiyose A, Uemori R, Minagawa M, Hoshino M, Nakashima T, Ishida K, Yasui H. Nippon Steel Technol Rep, 2004; 90: 2 [9] Bob I. Weld J, 1991; 70: 56 [10] Terada Y, Tamehiro H, Morimoto H, Hara T, Tsuru E,Asahi H. Proc OMAE, 2003: 1 [11] Rodriguez–Ibabe J M. Mater Sci Forum, 1998, 284–286: 51 [12] Guo A M,Misra R D K, Liu J B, Chen L, He X L, Jansto S J. Mater Sci Eng, 2010; A527: 6440 [13] Lambert P A, Gourgues A F, Besson J, Sturel T, Pinear A. Metall Mater Trans, 2004; 35A: 1039 [14] Gallo C, Alvarez J A, Gutierrez–Solana F, Polanco J A. Eur Struct Integr Soc, 2002; 30: 271 [15] Cvetkovski S, Adziev T, Adziev G, Sedmak A. Eur Struct Integr Soc, 2002; 30: 95 [16] Shi Y W. China Materials Engineering Canon: Materials Welding Engineering Vol.22. Beijing: Chemistry Industral Press, 2007: 128 (史耀武. 中国材料工程大典---材料焊接工程. 第22卷. 北京: 化学工业出版社, 2007: 128) [17] Diaz–Fuentes M, Iza–Mendia A, Gutierrez I. Metall Mater Trans, 2003, 23A: 2505 [18] Lee J L, Pan Y T. Mater Sci Eng, 1991; A136: 109 [19] Biss V, Cryderman R L. Metall Trans, 1971; 2: 2267 [20] Zhong Y, Xiao F R, Zhang J W, Shan Y Y, Wang W, Yang K. Acta Mater, 2006; 54: 435 [21] McMahon C J, Cohen M. Acta Metall, 1965; 13: 591 [22] Poorhaydari K, Patchett B M, Ivey D G. Mater Sci Eng, 2006; A435–436: 371 [23] Bonnevie E, Ferriere G, Ikhlef A, Kaplan D, Orain J M. Mater Sci Eng, 2004; A385: 352 [24] Lambert A, Drillet J, Gourgues A F, Sturel T, Pineau A. Sci Technol Weld Join, 2000; 5: 168 [25] Zhao M C, Hanamura T, Qiu H, Yang K. Mater Sci Eng, 2005; A395: 327 [26] Miao C L, Shang C J, Wang X M, Zhang L F. Acta Metall Sin, 2010; 46: 541 (缪成亮, 尚成嘉, 王学敏, 张龙飞. 金属学报, 2010; 46: 541) [27] Gourgues A F, Flower H M, Lindley T C. Mater Sci Technol, 2000; 16: 26 [28] Li Y, Baker T N. 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