Double fault in hexagonal close-packed crystals

Scaling behaviour of pair correlation functions for randomly faulted hexagonal close-packed structures

“…3(a). crystals which always retain longrange correlations (Sato, 1969;Pandey et al, 1980a;Kabra & Pandey, 1995). For > 0.5, the correlation length again starts increasing and, at = 1, the ABABAB .…”

“…It may be mentioned that this property of convergence of P(m) to 1/3 is not universal; the exception being layer displacement faults in h.c.p. crystals which always retain longrange correlations (Sato, 1969;Pandey et al, 1980a;Kabra & Pandey, 1995). The characteristic length scale (L) given by equations (11) and (12) is slightly less than the correlation length as it corresponds to the value of m for which exp(Àm/L) becomes 1/e.…”

A general theory for the diffraction line profiles of h.c.p. and f.c.c. polycrystals containing stacking faults

“…Various types of stacking faults in close-packed crystals (I) s = 1 : most random1.2 Growth faults (II) s = 2: WILSON3,4 (I) (III) s=3: JAGODZINSKI 1'5'6 (I) (I]) (IV) s= 1 : PATERSON7 (I) Extended growth faults (V) s--2: KAKINOKI 8,9 (I) (II) (IV) (VI) s=3: KArdNOrd8,9 (I) (II) (III) (IV) (V) in h.c.p. (VII) single: C"nR1S~Arql0 (I) Deformation { (VIII) double: SA'rO 11 faults l" (IV) single: PATERSON7 (I) in f.c.c, l (IX) double: JOm~SON12,13 (X) triple: SA'rol (1) Jagodzinski (1949a), (2) Guinier (1956), (3) Wilson (1942), (4) Hendricks & Teller (1942), (5)Jagodzinski (1949b), (6)Jagodzinski (1949c), (7) Paterson (1952), (8) Kakinoki (1965), (9) Kakinoki (1967), (10) Christian (1954), (11) Sato (1969), (12) Johnson (1963), (13) Warren (1963), (14) Sato (1966a). Kajiwara (1965) from a martensitic Cu-A1 alloy.…”

“…They are referred to as 'extended growth faults'. The necessity of this abandonment in the theory of stacking faults has been pointed out by Kakinoki, Komura & Hiziya (1955) and Kakinoki (1961Kakinoki ( , 1965Kakinoki ( , 1967, and experimental evidence favouring it has been presented by Nishiyama, Kakinoki & (1) Jagodzinski (1949a), (2) Guinier (1956), (3) Wilson (1942), (4) Hendricks & Teller (1942), (5) Jagodzinski (1949b), (6)Jagodzinski (1949c), (7) Paterson (1952), (8) Kakinoki (1965), (9) Kakinoki (1967), (10) Christian (1954), (11) Sato (1969), (12) Johnson (1963, (13) Warren (1963), (14) Sato (1966a). Kajiwara (1965) from a martensitic Cu-A1 alloy.…”

“…The 'single" (IV) and 'double' (IX) deformation faults in f.c.c, are referred to also as the 'intrinsic' and 'extrinsic' stacking faults, respectively (e.g. Barrett & Massalski, 1966 (Sato, 1966a(Sato, , 1969. If the fault probability for any type of 'deformation fault', invariably one in number, approaches unity, the structure tends invariably to the twin of the original structure.…”