Σ3 Boundaries in Ni,3Al 100 0 General GB Total 280 80 防 Cracked GB Total 83 60- NigAl 40 20 1 3 3c∑s25 3<E≤49 >49 ΣValue Cracked >3 boundaries were found to deviate more than 5 from the trace of the {111)plane. Lin et al.,Acta Metall.Mater.,41 (2):553-562(1993).3 Boundaries in Ni3Al Lin et al., Acta Metall. Mater., 41 (2): 553-562 (1993). Ni3Al Cracked 3 boundaries were found to deviate more than 5° from the trace of the {111} plane