ELECTRON-MICROSCOPY STUDIES OF TWIN MORPHOLOGIES IN B19' MARTENSITE IN THE TI-NI SHAPE-MEMORY ALLOY

被引：169

作者：

NISHIDA, M ^{[1
]}

OHGI, N ^{[1
]}

ITAI, I ^{[1
]}

CHIBA, A ^{[1
]}

YAMAUCHI, K ^{[1
]}

机构：

[1] TOKIN CORP, MAT SCI & DEV LAB, TAIHAKU KU, SENDAI 982, MIYAGI, JAPAN

来源：

ACTA METALLURGICA ET MATERIALIA | 1995年 / 43卷 / 03期

关键词：

D O I：

10.1016/0956-7151(94)00332-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Twins in the B19' martensite in the Ti-Ni shape memory alloy have been investigated by conventional transmission electron microscopy (CTEM) and electron diffraction. The following five twinning modes were observed. The [011] Type II twin was dominantly observed among those and confirmed to be a lattice invariant shear since most martensite variants consisted of the [011] Type, II twinning. The {11(1) over bar} Type I twinning was morphologically and characteristically divided into three types, i.e. a deformation twin, a variant accommodation twin and a lattice invariant shear. (100) and (001) compound twinnings were considered to be a deformation twin. The {011} Type I twinning was inevitably reconfirmed and considered to be a lattice invariant shear rather than a deformation twin since it extended over the whole martensite plate. The formation order,and mechanism of each twinning mode were qualitatively discussed in view of the elastic interaction accumulated during the martensitic transformation.

引用

页码：1219 / 1227

页数：9

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