RT Journal Article
SR Electronic
A1 Peković, Michal
A1 Opatová, Kateřina
A1 Rubešová, Kateřina
A1 Janda, Tomáš
A1 Jirková, Hana
A1 Bureš, Radovan
T1 Observation of Phase Transformations in High-temperature Chamber under Microscope Objective Lens
JF Manufacturing Technology Journal
YR 2019
VO 19
IS 5
SP 831
OP 835
DO 10.21062/ujep/380.2019/a/1213-2489/MT/19/5/831
UL https://journalmt.com/artkey/mft-201905-0019.php
AB Today, extensive information on a particular material can be obtained from its chemical composition using various computer programs. Such information includes phase transformation temperatures, such as Ac1 and Ac3 or the Ms and Mf, as well as the entire austenite decomposition sequence, as shown in TTT and CCT diagrams. When steel is heated, austenite grains begin to form, grow and eventually coarsen. On cooling, these grains decompose into pearlite, ferrite, cementite and hardening phases. Transformations of this kind are well understood nowadays, namely the ways the individual phases form and the rates and temperatures involved. Yet, in-situ visual recordings of such transformations are relatively rare. Using the Linkam TS1400XY heating stage, which is capable to heat samples up to 1400°C and is integrated in an optical microscope featuring objective lenses with modified working distances, these phase transformations can be observed directly. This paper explores the potential of the heating stage for studying various materials and their specific heat treatments. It also discusses the method of sample preparation for use in the heating stage placed in an optical microscope.