Structural changes of Cu-Zn-Al shape memory alloys during martensite aging determined by the ALCHEMI method

Journal Article · Thu Mar 31 23:00:00 EST 1994 · Materials Characterization; (United States)

DOI:https://doi.org/10.1016/1044-5803(94)90090-6· OSTI ID:7108889

Nakata, Yoshiyuki; Tadaki, Tsugio ^[1]; Yamamoto, Osamu ^[2]; Shimizu, Ken'ichi ^[3]

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1. Osaka Univ., Ibaraki (Japan). Inst. of Scientific and Industrial Research
2. Kawasaki Steel Corp., Okayama (Japan). Mizushima Works
3. Kanazawa Inst. of Tech., Ishikawa (Japan). Dept. of Mechanical Engineering

The Atom Location by Channeling Enhanced Microanalysis (ALCHEMI) method has been applied to a study of the effects of aging Cu-Zn-Al shape memory alloys. In order to discover an optimum experimental condition for the ALCHEMI method, electron beam intensities in crystals of Cu-Zn-Al alloys have first been examined on the basis of the dynamical theory of electron diffraction. Under such an optimum condition, the atomic arrangement of Zn atoms in Cu-Zn-Al alloys has been investigated for both the parent and martensite phases using Cu-11.4Zn-18.7Al and Cu-11.2Zn-17.1Al(at.%) alloys, respectively. The atomic arrangement was not changed significantly by aging of the parent phase, while it was changed by that of the martensitic phase. An increase in the reverse transformation temperature was attributed to the change in atomic arrangement during martensite aging.

• OSTI ID: 7108889
• Journal Information: Materials Characterization; (United States), Journal Name: Materials Characterization; (United States) Vol. 32:3; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
AGING
ALLOYS
ALUMINIUM ALLOYS
COPPER ALLOYS
COPPER BASE ALLOYS
ELASTICITY
MECHANICAL PROPERTIES
MORPHOLOGICAL CHANGES
PHASE STUDIES
PHYSICAL PROPERTIES
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
THERMOELASTICITY
TRANSITION TEMPERATURE
ZINC ALLOYS