Appearance recollects alloy to have what sort

Appearance recollects alloy to have what sort
(1) one-way memory effect

Appearance recollects alloy to be out of shape below inferior temperature, the appearance before be out of shape can recover after heating, this kind is heating only the appearance memory idea that exists in the process calls one-way memory effect.

(2) double Cheng recollects effect

Appearance of high temperature photograph recovers when certain alloy heats, microtherm photograph appearance can recover again when refrigeration, call double Cheng to recollect effect.

(3) whole journey recollects effect

Appearance of high temperature photograph recovers when heating, the microtherm photograph appearance with figure is same and contrary orientaton turns into when refrigeration, call whole journey to recollect effect.

The form that already developed a success currently recollects alloy to TiNi radical appearance recollects appearance of alloy, copper radical to recollect appearance of alloy, iron radical to recollect alloy to wait.

The news that recollects effect the earliest about appearance was made 1952 by the person such as Chang and Read. The reversibility that they observe the photograph in Au-Cd alloy changes. Also discovered same idea in Cu-Zn alloy later, but the wide attention that meantime did not cause people. Till 1962, buehler and its co-worker observe in the TiNi alloy that waits for atom comparing the memory effect that has microcosmic appearance change, just caused data division academia and industrial group pay attention to. Arrive at the beginning of 70 time, also discovered in the alloy such as CuZn, CuZnAl, CuAlNi change with martensite photograph concerned appearance recollects effect. Come a few years, the research that recollects alloy about appearance already became world look to change stage by stage the serious topic for discussion of the conference and data conference, held seminar for many times to meet for this, be abounded ceaselessly and perfected martensite photograph to become academic. When study ceaseless development in theory, appearance recollected the use research of alloy to also obtain great progress, its scope of application involves a lot of scopes such as mechanical, electron, chemical industry, space navigation, motivation and medical treatment.

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