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Martensitische Umwandlung von Chrom-Nickel-Stahl - Martensitpunkt 255 °C

Formal Metadata

Title
Martensitische Umwandlung von Chrom-Nickel-Stahl - Martensitpunkt 255 °C
Alternative Title
Martensitic Transformation of Nickel-Chromium-Steel - Martensitic Temperature 255 °C
Author
License
No Open Access License:
German copyright law applies. This film may be used for your own use but it may not be distributed via the internet or passed on to external parties.
Identifiers
IWF SignatureE 1151
Publisher
Release Date
Language
Producer
Production Year1966

Technical Metadata

IWF Technical DataFilm, 16 mm, 60 m ; SW, 5 1/2 min

Content Metadata

Subject Area
Genre
Abstract
German
German
Bildung von Martensit aus unterkühltem Austenit, Ablauf der Umwandlung bei sinkender Temperatur. Bevorzugte Orientierungen der Martensitnadeln in ehemaligen Austenitkörnern. Die Umwandlung selbst wird nicht aufgelöst.
English
English
The film shows the development of the martensite from the super-cooled austenite in the needle profile, formed by the sudden change of volume, of a polished surface of a chrome-nickel steel under the heating table microscope. The grain boundaries of the high temperature phase of the austenite also become visible. The shots are taken during the cooling off after an austenitisation at 1150 °C. They begin at about 300 °C just above the Ms-temperature, the start of the martensite formation. It can be seen that the austenite-martensite-transformation continues in the form of constantly new plate formation with decreasing temperatures. The development of one particular martensite plate cannot be observed owing to the high speed. The needles lie within a former austenite grain in certain preferred directions.
Keywords
German
German
English
English
IWF Classification
German
German
English
English