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Title: Superposing tensile stresses into single point incremental forming to affect martensitic transformation of SS304
Abstract Superposing pre-stress on a SS304 sheet metal blank in biaxial tension and performing a single point incremental forming operation on the stretched blank is investigated experimentally. By applying a pre-stress to the sheet metal blank prior to incremental forming, the resulting microstructural change can be affected to obtain functionally graded materials according to the intended application. In austenitic stainless steels, this variation of the stress states alters the phase transformation, specifically the martensitic transformation kinetics, by influencing key process parameters, such as process force, temperature, and equivalent plastic strain. The phase transformation in truncated square pyramids is measured using magnetic induction. These measurements validate the effectiveness of the stress superposition method for achieving the desired mechanical properties based on altering the final microstructure of a simple geometry.  more » « less
Award ID(s):
1757371
NSF-PAR ID:
10399037
Author(s) / Creator(s):
; ; ; ; ;
Date Published:
Journal Name:
IOP Conference Series: Materials Science and Engineering
Volume:
1238
Issue:
1
ISSN:
1757-8981
Page Range / eLocation ID:
012085
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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