Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 51, Issue 9, Pages 4765-4776Publisher
SPRINGER
DOI: 10.1007/s11661-020-05895-x
Keywords
-
Funding
- National Natural Science Foundation of China [51104066]
- Guangdong Provincial Foundation of Natural Science [2016A030313483]
- Guangdong Provincial Project for Science and Technology [2015A020214008, 2015A010105011]
- Science and Technology Research Project of Guangzhou [201505040925029]
Ask authors/readers for more resources
Ultrafine-grained (UFG) Ti-6Al-4V alloy with average grain sizes of 305, 430, and 669 nm was fabricated by high-energy ball-milling and spark plasma sintering. The mechanical behaviors of consolidated titanium alloy with different grain sizes were studied under uniaxial compression at the quasi-static strain rate of 1 x 10(-3) s(-1) and high strain rates ranging from 0.5 x 10(3) to 2.9 x 10(3) s(-1). Shear bands can be observed in specimens tested under quasi-static and dynamic condition. It is discovered that when the grain size decreases, the flow stress increases and shear band instability takes place at lower strains. The flow stresses of UFG titanium alloy with different grain sizes demonstrate similar dependence on the strain rate when the strain rate ranges from 1 x 10(-3) to 0.5 x 10(3) s(-1). However, the strain rate sensitivity m dramatically increases at higher strain rates and is reduced with the decrease of grain size. It is considered that the propensity for adiabatic shear banding chi(ASB) during dynamic compression is increased with the reduction of grain size because of the improved yield strength as well as the diminished strain rate sensitivity. (C) The Minerals, Metals & Materials Society and ASM International 2020
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available