1974
DOI: 10.2320/matertrans1960.15.211
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Electron Microscopy Study of Stress-induced Acicular γ′ Martensite in Cu–Al–Ni Alloy

Abstract: Stress-induced acicular martensites in Cu-14.2Al-4.3Ni (wt %) alloy were investigated by means of transmission spear-like martensite thermally formed in the same alloy in several respects such as in shape, lattice invariant shear, habit plane and orientation relationship, even though both have the same crystal structure and lattice parameters. The lattice invariant strain of the martensite was found to be stacking faults on the basal plane, and a defectless region was observed at the middle of the martensite, … Show more

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Cited by 19 publications
(13 citation statements)
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“…In order to deduce more definitely the above conclusion, it is desired to obtain diffraction patterns including the reflections with h=3 and 4 aligned parallel to the c*-axis in certain crystal orientations less affected by double diffractions, because 3kl (1=odd) and 4 kl (l=even) reflections are forbidden in the N2H and dander type structures, respectively, whereas they appear with finite intensities in the present M2H structure, as seen in Fig. 2 However, it should be noted that the striations in (a) are due to stacking faults but not to the {111} twins shown in the preceding section, since they are parallel to the (001) plane trace, and moreover that the faulted martensite does martensite (22).…”
Section: Discussionmentioning
confidence: 76%
“…In order to deduce more definitely the above conclusion, it is desired to obtain diffraction patterns including the reflections with h=3 and 4 aligned parallel to the c*-axis in certain crystal orientations less affected by double diffractions, because 3kl (1=odd) and 4 kl (l=even) reflections are forbidden in the N2H and dander type structures, respectively, whereas they appear with finite intensities in the present M2H structure, as seen in Fig. 2 However, it should be noted that the striations in (a) are due to stacking faults but not to the {111} twins shown in the preceding section, since they are parallel to the (001) plane trace, and moreover that the faulted martensite does martensite (22).…”
Section: Discussionmentioning
confidence: 76%
“…При точечной деформации монокристаллических образцов сплава Cu-14,2 мас.% Al-4,3 мас.% Ni (М н   30-40С) возникает как  1 (18R)-, так и (2H)-фаза [71][72][73]. Температура деформации оказы-вает существенное влияние и на кристаллическую структуру мар-тенситной фазы: при растяжении при температуре 60,5С, распо-ложенной выше А к (90С) в сплаве Cu-14,5 мас.% Al-4,4 мас.% Ni (М н   140С), образуется  1 -фаза, а нагружение при 98С (немного ниже А к ) приводит к возникновению -фазы [74].…”
Section: деформационные явления при мартенситных превращениях 79unclassified
“…Например, в сплаве Cu-Al-Ni при то-чечной деформации образуется -фаза с упаковкой 2Н, но с дефек-тами упаковки, которые обычно не наблюдаются в -фазе, возник-шей при охлаждении [73]. В мартенсите сплавов Cu-Al-Mn при де-формации сжатием кроме тонких двойников образуются также ДУ, широкие двойники (деформации) с плоскостями двойникования {121}  и {101}  и дислокации [81].…”
Section: деформационные явления при мартенситных превращениях 79unclassified
“…This is a singlecrystal variant with stacking faults (Otsuka et al 1974, 1979, Horikawa et al 1988. G i is the lattice deformation of β 1 martensite.…”
Section: On the Transformation From β 1 To βmentioning
confidence: 99%
“…(2) the microstructure determination of the parent phase and the different martensitic variants by using TEM, SEM, x-rays, etc (Otsuka and Shimizu 1969, 1974b, Otsuka et al 1974, Ichinose et al 1985, Okamoto et al 1986, Horikawa et al 1988; and (3) the micro-macro-related deformation measurement by using high-resolution moiré interferometry (Sun et al 1999a, b, Zhang et al 1999, 2000.…”
Section: Introductionmentioning
confidence: 99%