Effects of Boron on the Microstructure, Ductility-dip-cracking, and Tensile Properties for NiCrFe-7 Weld Metal

doi:10.1016/j.jmst.2015.08.001

Abstract

Abstract: The distribution of boron and the microstructure of grain boundary (GB) precipitates (M₂₃(C, B)₆ and M₂B) have been analyzed with their effects on the susceptibility of ductility-dip-cracking (DDC) and tensile properties for NiCrFe-7 weld metal, using optical microscopy (OM), secondary ion mass spectroscopy (SIMS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results show that boron segregates at GBs in NiCrFe-7 weld metal during the welding process. The segregation of boron at GBs promotes the formation of continuous M₂₃(C, B)₆ carbide chains and M₂B borides along GBs. The addition of boron aggravates GB embrittlement and causes more DDC in the weld metal, by its segregation at GBs presenting as an impurity, and promoting the formation of larger and continuous M₂₃(C, B)₆ carbides, and M₂B borides along GBs. DDC in the weld metal deteriorates the ductility and tensile strength of the weld metal simultaneously.

Key words: Boron, M23C6, M2B, Ductility-dip-cracking, Tensile properties

Wenlin Mo, Xiaobing Hu, Shanping Lu, Dianzhong Li, Yiyi Li. Effects of Boron on the Microstructure, Ductility-dip-cracking, and Tensile Properties for NiCrFe-7 Weld Metal[J]. J. Mater. Sci. Technol., 2015, 31(12): 1258-1267.

References

[1] F. Huang, J.Q. Wang, E.H. Han, W. KeJ. Mater. Sci. Technol, 28 (2012), pp. 562-568
[2] Z. Zhang, J. Wang, E.H. Han, W. KeJ. Mater. Sci. Technol, 28 (2012), pp. 785-792
[3] T.Y. Kuo, H.T. LeeMater. Sci. Eng. A, 338 (2002), pp. 202-212
[4] M. Casales, V.M. Salinas-Bravo, A. Martinez-Villafane, J.G. Gonzalez-RodriguezMater. Sci. Eng. A, 332 (2002), pp. 223-230
[5] R.S. Dutta, R. Tewari, P.K. DeCorros. Sci, 49 (2007), pp. 303-318
[6] J. Crum, R. Scarberry, J. MaterEnergy Syst, 4 (1982), pp. 125-130
[7] S.J. Zinkle, G.S. WasActa Mater, 61 (2013), pp. 735-758
[8] T. Allen, J. Busby, M. Meyer, D. PettiMater. Today, 13 (2010), pp. 14-23
[9] H.T. Lee, S.L. Jeng, C.H. Yen, T.Y. KuoJ. Nucl. Mater, 335 (2004), pp. 59-69
[10] R. Qin, Z. Duan, G. HeMetall. Mater. Trans. A, 44 (2013), pp. 4661-4670
[11] A.J. Ramirez, J.C. LippoldMater. Sci. Eng. A, 380 (2004), pp. 259-271
[12] G.A. Young, T.E. Capobianco, M.A. Penik, B.W. Morris, J.J. McGeeWeld. J., 87 (2008), pp. 31s-43s
[13] K. Nishimoto, K. Saida, H. OkauchiSci. Technol. Weld. Joining, 11 (2006), pp. 455-461
[14] A.J. Ramirez, J.C. LippoldMater. Sci. Eng. A, 380 (2004), pp. 245-258
[15] W.L. Mo, S.P. Lu, D.Z. Li, Y.Y. LiMater. Sci. Eng. A, 582 (2013), pp. 326-337
[16] W.L. Mo, S.P. Lu, D.Z. Li, Y.Y. LiJ. Mater. Sci. Technol, 29 (2013), pp. 458-466
[17] K. Nishimoto, K. Saida, H. Okauchi, K. OhtaSci. Technol. Weld. Joining, 11 (2006), pp. 471-479
[18] K. Saida, Y. Nomoto, H. Okauchi, H. Ogiwara, K. NishimotoSci. Technol. Weld. Joining, 17 (2012), pp. 1-8
[19] K. Saida, A. Taniguchi, H. Okauchi, H. Ogiwara, K. NishimotoSci. Technol. Weld. Joining, 16 (2011), pp. 553-560
[20] T.E. Capobianco, M.E. Hanson, in: KAPL (Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY, 2005.
[21] D.J. Lee, Y.S. Kim, Y.T. Shin, E.C. Jeon, S.H. Lee, H.J. Lee, S.K. Lee, J.H. Lee, H.W. LeeMet. Mater. Int, 16 (2010), pp. 813-817
[22] A.J. Ramirez, J.C. LippoldT. Böllinghaus, H. Herold (Eds.), Hot Cracking Phenomena in Welds, Springer, Berlin and Heidelberg (2005), pp. 19-41
[23] A.J. Ramirez, C.M. GarzonT. Böllinghaus, H. Herold, C. Cross, J. Lippold (Eds.), Hot Cracking Phenomena in Welds II, Springer, Berlin Heidelberg (2008), pp. 427-453
[24] N.E. Nissley, J.C. LippoldProceedings of the 7th International Conference on Trends In Welding Research, Callaway Gardens ResortPine Mountain, Georgia, USA (2006), pp. 327-332
[25] M.G. Collins, A.J. Ramirez, J.C. LippoldWeld. J., 83 (2004), pp. 39S-49S
[26] N.E. Nissley Intermediate temperature grain boundary embrittlement in nickel-base weld metals Ph.D. thesis; The Ohio State University (2006)
[27] K. Nishimoto, K. Saida, H. Okauchi, K. OhtaSci. Technol. Weld. Joining, 11 (2006), pp. 462-470
[28] A.J. Ramirez, C.M. GarzonHot cracking phenomena in weldsBerlin, Germany; March 5-6 (2007), pp. 427-453
[29] S.L. Jeng, H. Lee, W.P. Rehbach, T.Y. Kuo, T.E. Weirich, J.P. MayerMater. Sci. Eng. A, 397 (2005), pp. 229-238
[30] V. Shankar, T.P.S. Gill, A.L.E. Terrance, S.L. Mannan, S. SundaresanMetall. Mater. Trans. A, 31 (2000), pp. 3109-3122
[31] R. VallantT. Böllinghaus, H. Herold (Eds.), Hot Cracking Phenomena in Welds, Springer, Berlin Heidelberg (2005), pp. 141-164
[32] D. Tytko, P.P. Choi, J. Klower, A. Kostka, G. Inden, D. RaabeActa Mater, 60 (2012), pp. 1731-1740
[33] M. Thuvander, K. StillerMater. Sci. Eng. A, 281 (2000), pp. 96-103
[34] N.L. Richards, M.C. ChaturvediInt. Mater. Rev, 45 (2000), pp. 109-129
[35] D. McLeanGrain Boundaries in MetalsClarendon Press, Oxford (1957), p. 340
[36] W. Chen, M.C. Chaturvedi, N.L. RichardsMetall. Mater. Trans. A, 32 (2001), pp. 931-939
[37] X.L. He, M. Djahazi, J.J. Jonas, J. JackmanActa Metall. Mater, 39 (1991), pp. 2295-2308
[38] X.L. He, Y.Y. Chu, J.J. JonasActa Metall, 37 (1989), pp. 2905-2916
[39] W. Chen, M.C. Chaturvedi, N.L. Richards, G. McMahonMetall. Mater. Trans. A, 29 (1998), pp. 1947-1954
[40] L. Karlsson, H. Norden, H. OdeliusActa Metall, 36 (1988), pp. 1-12
[41] K.R. Vishwakarma, M.C. ChaturvediMater. Sci. Technol, 25 (2009), pp. 351-360
[42] L. Karlsson, H. NordenActa Metall, 36 (1988), pp. 35-48
[43] X. Hu, Y. Zhu, N. Sheng, X. MaSci. Rep, 4 (2014), pp. 1-9
[44] X.B. Hu, Y.L. Zhu, X.L. MaActa Mater, 68 (2014), pp. 70-81
[45] I. Goldfarb, W.D. Kaplan, S. Ariely, M. BambergerPhilos. Mag. A, 72 (1995), pp. 963-979
[46] S.M. Corporation http://www.specialmetals.com/assets/smw_docs/fm52m.pdf (2009)
[47] M. Chaturvedi, W. Chen, A. Saranchuk, N. RichardsSuperalloys 718, 625, 706 and various derivatives(1997), pp. 743-751
[48] N.E. Nissley, J.C. LippoldWeld. J., 88 (2009), pp. 131s-140s
[49] W.L. Mo, S.P. Lu, D.Z. Li, Y.Y. LiMetall. Mater. Trans. A, 45 (2014), pp. 5114-5126
[50] C.L. White, J.H. Schneibel, R.A. PadgettMetall. Trans. A, 14 (1983), pp. 595-610
[51] M. Miller, J. Horton, W. Cao, R. KennedyJ. Phys. IV, 6 (1996), pp. 241-246
[52] Z. Lei, R. Schlesiger, R. Chellali, D. Baither, G. SchmitzMater. Des, 34 (2012), pp. 155-158
[53] F.F. Noecker, J.N. DuPontWeld. J., 88 (2009), pp. 62s-77s
[54] W.L. Mo, X. Zhang, S.P. Lu, D.Z. Li, Y.Y. LiActa Metall. Sin, 51 (2014), pp. 230-238 in Chinese
[55] B.C. Peng, H.X. Zhang, J. Hong, J.Q. Gao, H.Q. Zhang, Q.J. Wang, J.F. LiMater. Sci. Eng. A, 528 (2011), pp. 3625-3629
[56] J.Q. Chen, H. Lu, C. Yu, J.M. Chen, M.L. ZhangSci. Technol. Weld. Joining, 18 (2013), pp. 346-353
[57] X. Li Effects of misorientation on the tensile and fatigue properties of SRR99 superalloy bicrystals at room temperature Master thesis; Graduate University of Chinese Academy of Sciences (2012)
[58] P. Venkiteswaran, M. Bright, D. TaplinMater. Sci. Eng, 11 (1973), pp. 255-268