Surface characterization of austenitic stainless steel 304L after different grinding operations
2017 (English)In: INTERNATIONAL JOURNAL OF MECHANICAL AND MATERIALS ENGINEERING, ISSN 1823-0334, Vol. 12, 6Article in journal (Refereed) Published
Background: The austenitic stainless steel 304L is widely used as a structural material for which the finished surface has significant effect on the service performance. A study of the grinding process with regard to the quality of the ground surfaces is therefore interesting from the point of view of both industrial application and scientific research. Method: This work investigates the influence of grinding parameters including abrasive grit size, machine power, and grinding lubrication on the surface integrity of the austenitic stainless steel 304L. The induced normal grinding force, grinding surface temperature, metal removal rate, and surface property changes have been investigated and compared. Results and Conclusion: Using grinding, lubrication significantly enhanced the metal removal rate. Surface defects (deep grooves, smearing, adhesive chips, and indentations), a highly deformed thin surface layer up to a few microns in thickness, and high surface tensile residual stresses parallel to the grinding direction have been observed as the main damage induced by the grinding operations. Surface finish and deformation were found to be improved by using smaller abrasive grits or by using lubrication during grinding. Increasing the machine power increased surface deformation while reducing surface defects. The results obtained can provide a reference for choosing appropriate grinding parameters when machining 304L; and can also help to understand the failure mechanism of ground austenitic stainless steel components during service.
Place, publisher, year, edition, pages
Springer, 2017. Vol. 12, 6
Austenitic stainless steel 304L, Grinding, Surface characterization, Microstructure, Residual stress
IdentifiersURN: urn:nbn:se:kth:diva-203823DOI: 10.1186/s40712-017-0074-6ISI: 000394390400001OAI: oai:DiVA.org:kth-203823DiVA: diva2:1084450
QC 201703242017-03-242017-03-242017-03-24Bibliographically approved