Manufacturing Technology 2020, 20(3):355-360 | DOI: 10.21062/mft.2020.053

Microstructural Evolution in 42SiCr Steel in a High-Temperature Chamber Under Microscope Objective

Michal Peković1, Hana Jirková1, Kateřina Rubešová1, Tomáš Janda1, Radovan Bureš2
1 Faculty of Mechanical Engineering – Regional Technological Institute, University of West Bohemia, Univerzitní 8, 306 14 Pilsen, Czech Republic
2 Institute of Materials Research, Slovak Academy of Science, Watsonova 47, 040 01 Košice, Slovak Republic

Thanks to today’s computer programs, engineers can derive a large amount of information from chemical com-position of a material. This information includes phase transformation temperatures Ac1, Ac3, Ms and Mf. CCT and TTT diagrams for austenite decomposition can be determined as well. When steel is heated, austenite grains nu-cleate and grow in the initial microstructure. On cooling, the grains decompose into pearlite, ferrite, cementite and hardening phases. Transformations of this kind are thoroughly described in literature: the ways the individual phases form and the speed of their formation and temperatures involved. However, in-situ visual recordings of such transformations are relatively rare. With Linkam TS1400XY high-temperature stage and chamber integrat-ed in an optical microscope, one can observe phase transformations in situ during heating and cooling. This paper explores microstructural evolution in 42SiCr steel in the course of heat treatment in a high-temperature chamber on an optical microscope stage which offers observation of changes in the material right under the microscope objective.

Keywords: high-temperature chamber, phase transformations, optical and electron microscopy, heat treatment
Grants and funding:

The Project LO1502 ‘Development of the Regional Technological Institute‘ under the auspices of the National Sustainability Programme I of the Ministry of Education of the Czech Republic aimed to support research, experimental development, and innovation.

Received: April 5, 2020; Revised: June 5, 2020; Accepted: July 28, 2020; Prepublished online: September 3, 2020; Published: September 7, 2020  Show citation

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Peković M, Jirková H, Rubešová K, Janda T, Bureš R. Microstructural Evolution in 42SiCr Steel in a High-Temperature Chamber Under Microscope Objective. Manufacturing Technology. 2020;20(3):355-360. doi: 10.21062/mft.2020.053.
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