Strain-induced ε-martensite transformation during nanoindentation of high-nitrogen steel

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 598; pp. 56 - 61
• Main Authors: AHN, Tae-Hong, SUNG BO LEE, PARK, Kyung-Tae, KYU HWAN OH, HEUNG NAM HAN
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier 26.03.2014
• Subjects: Applied sciences; Austenite; Compressive properties; Cross-disciplinary physics: materials science; rheology; Dislocations; Exact sciences and technology; Martensitic transformations; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Microstructure; Nanoindentation; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Quantitative analysis; Stainless steels; Strain; Transformations; Nanohardness; Austenite transformation; Metastable states; Nanoindentation; Martensitic transformations; Mechanical properties; Displacement(deformation); Plastic deformation; Partial dislocation; Shockley partial dislocation; High nitrogen steels; Orientation relation; High-nitrogen stainless steel; Compressive stress; Pop-in; Hardness testing; High nitrogen steel; ε-martensite; Stress effects; Hardness indentation; Microstructure; Martensite; Quantitative chemical analysis

The strain-induced austenite-to- epsilon -martensite transformation during nanoindentation of metastable austenite in a high-nitrogen stainless steel was investigated by observation of the microstructural changes underneath the indent. In the nanoindentation load-displacement curve, several small po...