NDLI: Ductility of Advanced High-Strength Steel in the Presence of a Sheared Edge

Content Provider	Springer Nature Link
Author	Ruggles, Tim Cluff, Stephen Miles, Michael Fullwood, David Daniels, Craig Avila, Alex Chen, Ming
Copyright Year	2016
Abstract	The ductility of dual-phase (DP) 980 and transformation-induced plasticity (TRIP) assisted bainitic ferritic (TBF) 980 steels was studied in the presence of a sheared edge. Specimens were tested in uniaxial tension in a standard test frame as well as in situ in the scanning electron microscope (SEM). Incremental tensile straining was done in the SEM with images taken at each strain increment. Then digital image correlation (DIC) was used to compute the effective strain at the level of the individual phases in the microstructure. Shear banding across multiple phases was seen in strained TBF specimens, while the DP specimens exhibited more of a patchwork strain pattern, with high strains concentrated in ferrite and low strains observed in the martensite. Two-point statistics were applied to the strain data from the DIC work and the corresponding microstructure images to evaluate the effect of phase hardness on localization and fracture. It was observed that the DP 980 material had a greater tendency for localization around hard phases compared to the TBF 980. This at least partially explains the greater ductility of the TBF material, especially in specimens where a sheared edge was present.
Starting Page	1839
Ending Page	1849
Page Count	11
File Format	PDF
ISSN	10474838
Journal	JOM
Volume Number	68
Issue Number	7
e-ISSN	15431851
Language	English
Publisher	Springer US
Publisher Date	2016-05-09
Publisher Institution	The Minerals, Metals & Materials Society (TMS)
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Chemistry/Food Science Physics Environment Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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