Residual stress and surface microhardness post-milling in 2205 duplex steel

The improvement of mechanical strength and corrosion in duplex stainless steels can be maximized when the fractions between phases (α) and (γ) are balanced. Machining operations may compromise surface integrity through microstructural deformations. In this study, surface milling of a 2205 duplex ste...

Full description

Saved in:
Bibliographic Details
Published inInternational journal of advanced manufacturing technology Vol. 113; no. 11-12; pp. 3445 - 3455
Main Authors dos Santos, Carlos Eduardo, Carneiro, José Rubens Gonçalves, da Silva, Gilmar Cordeiro, Brito, Pedro Paiva, dos Santos, Ítalo Bruno, Campos, Thais Roberta
Format Journal Article
LanguageEnglish
Published London Springer London 01.04.2021
Springer Nature B.V
Subjects
Austenite
CAE) and Design
Computer-Aided Engineering (CAD
Cutting tools
Diamond pyramid hardness
Duplex stainless steels
Engineering
Industrial and Production Engineering
Martensite
Mechanical Engineering
Mechanical properties
Media Management
Microstructure
Milling (machining)
Optical microscopy
Optical properties
Original Article
Plastic deformation
Residual stress
Shearing
Surface integrity
Residual stresses
Martensite formation
Austenite
Milling
Online AccessGet full text

Cover

More Information
Summary:The improvement of mechanical strength and corrosion in duplex stainless steels can be maximized when the fractions between phases (α) and (γ) are balanced. Machining operations may compromise surface integrity through microstructural deformations. In this study, surface milling of a 2205 duplex steel was performed under Vc conditions between 298 and 651 m/min and fz between 0.04 and 0.18 mm/tooth. The microstructural evolution characteristics, mechanical properties and residual stresses were investigated by optical microscopy, SEM, MFM, XRD and Vickers microhardness. After milling, microstructure was found to be deformed by shearing of the cutting tool, and the volume fraction of austenite and ferrite was altered, as determined by Rietveld refinements because of the transformation of austenite into martensite (α') induced by plastic deformation. The samples also exhibited variations in phase-specific microhardness, associated with strain-induced martensite formation and the presence of tensile residual stresses.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-021-06829-6