Constitutive behavior, texture and damage evolution in BCC metal using taylor impact test.

Conference · Thu Jan 01 00:00:00 EST 2004

OSTI ID:977873

Trujillo, C P ^[1]; Gray, III, G T ^[2]; Chen, S R ^[3]; Chavez, R L ^[4]

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1. Carl P.
2. George T.
3. Shuh-Rong
4. Reynaldo L.

To capture the evolution of anisotropy in textured metals under high rate conditions, we developed a method that enables us to digitally resolve this event. Using a Taylor Anvil Test Facility, we dynamically deformed unalloyed Ta, while capturing real time digital images of the radial flow at the impact surface. We measured the elliptical footprint and plotted its eccentricity (ratio of major to minor diameters) versus real time. The current engineering strength constitutive models allow for an initial texture, but they cannot accurately predict the texture evolution during deformation. This test will allow us to track anisotropy to better validate our constitutive models.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• OSTI ID: 977873
• Report Number(s): LA-UR-04-6761; TRN: US201012%%563
• Resource Relation: Conference: Submitted to: TMS Fall Meeting, New Orleans, LA., September 26-29, 2004
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BCC LATTICES
ANISOTROPY
IMPACT TESTS
TEXTURE
TANTALUM
MATHEMATICAL MODELS
DEFORMATION