Flow instabilities and fracture in Ti-6Al-4V deformed in compression at 298 K to 673 K

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02652318· OSTI ID:6999385

Kailas, S V; Prasad, Y V.R.K.; Biswas, S K ^[1]

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1. Indian Inst. of Science, Bangalore (India)

Uniaxial compression tests were conducted on Ti-6Al-4V specimens in the strain-rate range of 0.001 to 1 s[sup [minus]1] and temperature range of 298 to 673 K. The stress-strain curves exhibited a peak flow stress followed by flow softening. Up to 523 K, the specimens cracked catastrophically after the flow softening started. Adiabatic shear banding was observed in this regime. The fracture surface exhibited both mode I and II fracture features. The state of stress existing in a compression test specimen when bulging occurs is responsible for this fracture. The instabilities observed in the present tests are classified as geometric'' in nature and are state-of-stress dependant, unlike the intrinsic'' instabilities, which are dependent on the dynamic constitutive behavior of the material.

• OSTI ID: 6999385
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 25:10; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
DATA
DEFORMATION
EXPERIMENTAL DATA
FLOW STRESS
FRACTURE PROPERTIES
INFORMATION
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MICROSTRUCTURE
NUMERICAL DATA
STRESSES
TESTING
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
VANADIUM ALLOYS