Revealing Prior-Austenite Grain Boundaries and Martensitic Structure of As-Quenched AISI 4140 Steel Treated by Plasma Electrolysis

• Authors: L. Cenk Kumruoglu , A. Özel
• Languages of publication: EN

Abstracts

EN

The determination of prior-austenite grain size has been the subject of metallurgical research efforts for many years. Metallurgical laboratories are often required to perform prior-austenite grain size determinations on martensitic steel components that have been heat treated. Although these methods may occasionally be mandated by material or procedural specifications, they are typically not preferred because they have a tendency of altering the as-received microstructure. These processes can also be labour-intensive and costly. The goal of this work is to chemically etch and identify the prior austenite grain size and martensitic structure of AISI 4140 steel treated by plasma electrolysis. Polished samples were immersed in 60% HCl, 30% HNO_3, 5% HF, 5% H_2O for 5 seconds then immersed in 5% picric acid, 5% HCl, 90% ethanol to reveal microstructures. Finally, the grain boundary and lath martensitic structure were revealed.

Keywords

EN

81.40.Gh; 81.40.-z; 81.65.Cf; 52.50.-b

Discipline

• 52.50.-b: Plasma production and heating(see also 52.80.-s Electric discharges)
• 81.40.-z: Treatment of materials and its effects on microstructure, nanostructure, and properties
• 81.65.Cf: Surface cleaning, etching, patterning(see also 52.77.Bn Etching and cleaning in physics of plasmas)
• 81.40.Gh: Other heat and thermomechanical treatments

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 2
• Pages: 404-406

Dates

published

2013-02

Contributors

author

L. Cenk Kumruoglu

• Dept. of Metallurgy and Materials Eng., Faculty of Engineering, Sakarya University, Sakarya, Turkey

author

A. Özel

• Dept. of Metallurgy and Materials Eng., Faculty of Engineering, Sakarya University, Sakarya, Turkey

References

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• [3] A.L. Yerokhin, X. Nie, A. Leyland, A. Matthews, Surf. Coat. Technol. 122, 73 (1999)
• [4] L.C. Kumruoglu, A. Ozel, Mater. Manufact. Proc. 25, 923 (2010)
• [5] L. Kumruoglu, Becerik, C. Alexander, D. Ozel, A. Mimaroglu, Mater. Manufact. Proc. 24, 781 (2009)
• [6] http://www.industrialheating.com/Articles/Feature_Article/BNP_GUID_9-5-2006_A
• [7] O. McPherson, http://www.wpi.edu/Pubs/E-project/Available/E-project-042508-223025/unrestricted/MQP_Grain_Growth.pdf April 30, 2008

Identifiers

DOI

10.12693/APhysPolA.123.404