On preventing HAZ cracking in laser welded DS Rene 80 superalloy
作者： L O Osoba , R K Sidhu , O A Ojo
DOI: 10.1179/026708309X12560332736593
关键词: Materials science 、 Welding 、 Intergranular corrosion 、 Boride 、 Heat-affected zone 、 Metallurgy 、 Cracking 、 Grain boundary 、 Superalloy 、 Liquation
摘要: AbstractThe heat affected zone (HAZ) cracking behaviour in a laser beam directionally solidified (DS) Rene 80 nickel based superalloy subjected to preweld treatments was studied. The HAZ cracks the alloy are grain boundary liquation caused by reaction of both non-equilibrium secondary solidification product, MC carbides and equilibrium solid state γ′ precipitates. In contrast theoretical prediction treatment that reduced liquid film thickness did not result lower cracking, which can be related concomitant reduction ability base relax welding stress. addition, formation intergranular M5B3 boride particles appeared have aided susceptibility lowering temperature widening brittle range during cooling. Based on analysis results, application new prevents fo...
unilag.edu.ng参考文章(19)
Gürel Çam, Mustafa Koçak, Progress in joining of advanced materials International Materials Reviews. ,vol. 43, pp. 1- 44 ,(1998) , 10.1179/IMR.1998.43.1.1
M. McLean, A. Strang, Effects of trace elements on mechanical properties of superalloys Metals technology. ,vol. 11, pp. 454- 464 ,(1984) , 10.1179/030716984803274800
R. T. Holt, W. Wallace, Impurities and trace elements in nickel-base superalloys International Materials Reviews. ,vol. 21, pp. 1- 24 ,(1976) , 10.1179/IMTR.1976.21.1.1
O.A. Ojo, H.R. Zhang, Analytical Electron Microscopy Study of Boron-Rich Grain Boundary Microconstituent in Directionally Solidified RENE 80 Superalloy Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 39, pp. 2799- 2803 ,(2008) , 10.1007/S11661-008-9646-7
Michael Kurban, U. Erb, K.T. Aust, A grain boundary characterization study of boron segregation and carbide precipitation in alloy 304 austenitic stainless steel Scripta Materialia. ,vol. 54, pp. 1053- 1058 ,(2006) , 10.1016/J.SCRIPTAMAT.2005.11.055
W.A. Miller, G.A. Chadwick, On the magnitude of the solid/liquid interfacial energy of pure metals and its relation to grain boundary melting Acta Metallurgica. ,vol. 15, pp. 607- 614 ,(1967) , 10.1016/0001-6160(67)90104-6
O.A. Ojo, N.L. Richards, M.C. Chaturvedi, Contribution of constitutional liquation of gamma prime precipitate to weld HAZ cracking of cast Inconel 738 superalloy Scripta Materialia. ,vol. 50, pp. 641- 646 ,(2004) , 10.1016/J.SCRIPTAMAT.2003.11.025
D. McLean, A. Maradudin, Grain Boundaries in Metals Physics Today. ,vol. 11, pp. 35- 36 ,(1958) , 10.1063/1.3062658
Xiao Huang, M.C. Chaturvedi, N.L. Richards, J. Jackman, The effect of grain boundary segregation of boron in cast alloy 718 on HAZ microfissuring: A sims analysis Acta Materialia. ,vol. 45, pp. 3095- 3107 ,(1997) , 10.1016/S1359-6454(97)00017-7
G. Wang, D.S. Xu, N. Ma, N. Zhou, E.J. Payton, R. Yang, M.J. Mills, Y. Wang, Simulation study of effects of initial particle size distribution on dissolution Acta Materialia. ,vol. 57, pp. 316- 325 ,(2009) , 10.1016/J.ACTAMAT.2008.09.010