Extreme twinning and hardening of 316L from a scalable impact process
- Resource Type
- Authors
- Aparna Singh; Glenn S. Daehn; Steve Hansen; Ankur Kumar Agrawal; Anupam Vivek
- Source
- IndraStra Global.
- Subject
- Materials science
Impulse processing
Austenitic stainless steel
DYNAMIC PLASTIC-DEFORMATION
DUCTILITY
SURFACE-LAYER
COPPER
02 engineering and technology
VFA
01 natural sciences
Indentation and hardness
NANOSCALE
0103 physical sciences
General Materials Science
Composite material
FOIL method
Nanotwins
010302 applied physics
Nanocrystalline materials
ULTRAHIGH STRENGTH
304-STAINLESS-STEEL
REFINEMENT
Mechanical Engineering
AUSTENITIC STAINLESS-STEEL
Strain rate
021001 nanoscience & nanotechnology
Condensed Matter Physics
Mechanics of Materials
Hardening (metallurgy)
METALS
Deformation (engineering)
0210 nano-technology
Crystal twinning
- Language
- English
- ISSN
- 2381-3652
A strain of 10% is applied to 316L stainless steel specimens at strain rates of 7.7 x 10(4) s(-1), 200 s(-1) and 50 s(-1) using vaporizing foil actuator (VFA) technique for the highest strain rate and dynamic plastic deformation (DPD) for the lower strain rates. There is a dramatic increase in hardness with increasing strain rate, rising to over 2.2 GPa at the highest strain rate. While the average twin thickness remained similar across different strain rate regimes, a dense criss cross pattern of twins is formed at the highest strain rate from activation of deformation twinning in non-parallel planes. This shows promise for VFA driven flyers process as a method for surface modification and hardening. (C) 2018 Elsevier B.V. All rights reserved.