Rapid magnetometric technique to plot isothermal transformation diagrams
Journal Article
·
· Metall. Trans., A; (United States)
- Univ. of Connecticut, Storrs
A sensitive magnetic permeability method for rapid determination of isothermal transformation diagrams in steel and iron base alloys is described. The method consists of quenching the sample from an austenitizing temperature to a subcritical temperature in an isothermal bath, and holding it within the magnetic field of an inductor coil. The increase in permeability accompanying austenite decomposition increases the inductance of the coil, and this changes the resonant frequency of the circuit. An automatic continuous recording of the corresponding period provides a convenient and accurate method for following the austenite decomposition of AISI 4340 in the bainite and martensite temperature ranges. This method provides quantitative information on austenite decomposition kinetics within two seconds after the start of quenching.
- OSTI ID:
- 7353273
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 7A:1; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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