Reply to comments “On the fine structure in twins”

LETTERS

TO

THE

83

EDITOR

SPECIMEN SURF. EN SURF. FIG. 2

A Specimen axis FIG. 3. x Initial specimen axis. after 100 per cent deformation. 0 Twin plane in Figs. 1 and 2. 0 Basal plane in twin.

subject.

We also wish to thank Miss Y. Kishi for her

assistance in the electron micrography.

FIG. 1. Peculiar markings MXOSStwin band. x 1530

of (1122> slip in twin, they may be reasonably regarded as kink bands.

Dept. of Phys., Kyoyobu, Kyoto Univ., Kyoto, +Jupan

H. KIHO

Dept. of Phys., Osalca Women’s Univ., Osaka, Japan

X . MARUYAMA

1. J. J.

GILMAN,

* Received

Acta Met. 3, 209 (1955).

July 18, 1960.

The writers would like to thank Professor K. Tanaka for his continuous

interest and encouragement

Reply to comments “On the fine structure in twins”*

in this

It seems to me that there is no reason to suppose BASAL SLIP ,N MAm

BASAL WP

that the markings

observed

pertain to those observed two sets of markings

by Kiho and Maruyama

previously

by myself.

seem to have different

The

origins

because:

(a) their general appearances are markedly different ; (b) my markings were observed

only in twins that

formed in heavily pre-strained

zinc;

whereas the

present markings appear in twins in as-cast zinc;

(cl my

markings

remnants

were

attributed

of the matrix.

to

Consistent

un-twinned with this,

they partially disappeared upon further deformation. The kink bands of Kiho and Maruyama would not be expected to do this. J. J.

Electric Research Laboratory, Schenectady, N. Y. General

t TWIN BAN’0 FIG. 2. Fine structures in twins. ^. . Wlman’s paper.

Traced from

* Received

September

8, 1960.

GILMAN