J. Cao et al Materials and Design 32(2011)2763-2770 (a) 20un 120um 20 WM S304H WM T92 20m Fig. 7. Metallographic structures of T92/S304H dissimilar materials joints, exhibiting (a)T92 base material. (b)S304H base material, (c)weld metal. (d)T92 fine grained HAZ (FGHAZ) (e)interface between T92 HAZ and weld metal, and (f) interface between S304H HAZ and weld metal. 100u Fig 8. EBSD grain orientation map of (a)T92 CGHAZ, and (b) weld metal near T92 CGHAZ side. size as t92 base material, the strengths of them are different Due solid solution strengthening and dispersion strengthening effects to high alloy elements content in S304H austenitic steel (Table 1), caused by these alloy elements are stronger in $304H base materialsize as T92 base material, the strengths of them are different. Due to high alloy elements content in S304H austenitic steel (Table.1), solid solution strengthening and dispersion strengthening effects caused by these alloy elements are stronger in S304H base material Fig. 8. EBSD grain orientation map of (a) T92 CGHAZ, and (b) weld metal near T92 CGHAZ side. Fig. 7. Metallographic structures of T92/S304H dissimilar materials joints, exhibiting (a) T92 base material, (b) S304H base material, (c) weld metal, (d) T92 fine grained HAZ (FGHAZ), (e) interface between T92 HAZ and weld metal, and (f) interface between S304H HAZ and weld metal. 2766 J. Cao et al. / Materials and Design 32 (2011) 2763–2770