Open AccessGROUP THEORETICAL DETERMINATION OF TWIN BOUNDARIES IN R-PHASE AND MARTENSITE OF Ni-Ti SHAPE MEMORY ALLOY
Author(s) -
Yi Hu-Chun,
Zhu Min,
Diya Yang
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.1376
Subject(s) - martensite , shape memory alloy , nickel titanium , materials science , crystal twinning , alloy , group (periodic table) , phase (matter) , crystallography , accommodation , condensed matter physics , titanium alloy , r phase , metallurgy , microstructure , optics , physics , chemistry , quantum mechanics
Twin boundaries were determined in both R-phase and martensite of NiTi shape memory alloy using group decomposition theory. It was found that there are four variants existing in the R-phase with {110}p and {100}p twin planes between the variants. The four variants may form three types of self-accommodation groups. While in the martensite phase, there may be three variants with {110}p twin planes between the variants. The three variants have four possibilities to form a self-accommodation group. These results are in good agreement with the experiment.