Formation and Morphology of Twinning in Titanium under High Strain Rate Deformation

B. Herrmann; A. Venkert; G. Kimmel; A. Landau; D. Shvarts; E. Zaretsky

doi:10.1063/1.1483616

Formation and Morphology of Twinning in Titanium under High Strain Rate Deformation

B. Herrmann, A. Venkert, G. Kimmel, A. Landau, D. Shvarts, E. Zaretsky

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The dynamic behavior of pure titanium was studied in planar impact experiments using a 25-mm pneumatic gun, at impact velocities of 150-550 m/sec. The sample free surface velocity was monitored by VISAR. Softly recovered samples were characterized utilizing XRD, and optical, SEM and TEM microscopy. Metallographic examination of the cross section areas of the impacted samples revealed impact-oriented twins with significantly lower concentration in the direct vicinity of the spall plane. TEM studies revealed dense dislocation areas and twins in the samples, with profound secondary twins and ordered dislocations cells near the spall plane. The results allow estimating the relative contribution of twinning mechanisms in shock-induced plastic deformation of titanium. The differences in the morphology of the area near the spall plane, in contrast to the rest of the sample, implies on alternative deformation mechanisms depending on the loading history.

Original language	English
Pages (from-to)	623-626
Journal	AIP Conference Proceedings
Volume	620
DOIs	https://doi.org/10.1063/1.1483616
State	Published - 1 Jul 2002

Keywords

Dynamic Characteristics
Impact Velocity
Plastic Deformation
Shock Waves
Strain Rate
Titanium
Twinning
Velocity Measurement
Deformation and plasticity
Metals semimetals and alloys
Grain and twin boundaries
High-pressure and shock wave effects in solids and liquids

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10.1063/1.1483616

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title = "Formation and Morphology of Twinning in Titanium under High Strain Rate Deformation",

abstract = "The dynamic behavior of pure titanium was studied in planar impact experiments using a 25-mm pneumatic gun, at impact velocities of 150-550 m/sec. The sample free surface velocity was monitored by VISAR. Softly recovered samples were characterized utilizing XRD, and optical, SEM and TEM microscopy. Metallographic examination of the cross section areas of the impacted samples revealed impact-oriented twins with significantly lower concentration in the direct vicinity of the spall plane. TEM studies revealed dense dislocation areas and twins in the samples, with profound secondary twins and ordered dislocations cells near the spall plane. The results allow estimating the relative contribution of twinning mechanisms in shock-induced plastic deformation of titanium. The differences in the morphology of the area near the spall plane, in contrast to the rest of the sample, implies on alternative deformation mechanisms depending on the loading history.",

keywords = "Dynamic Characteristics, Impact Velocity, Plastic Deformation, Shock Waves, Strain Rate, Titanium, Twinning, Velocity Measurement, Deformation and plasticity, Metals semimetals and alloys, Grain and twin boundaries, High-pressure and shock wave effects in solids and liquids",

author = "B. Herrmann and A. Venkert and G. Kimmel and A. Landau and D. Shvarts and E. Zaretsky",

year = "2002",

month = jul,

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doi = "10.1063/1.1483616",

language = "English",

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journal = "AIP Conference Proceedings",

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TY - JOUR

T1 - Formation and Morphology of Twinning in Titanium under High Strain Rate Deformation

AU - Herrmann, B.

AU - Venkert, A.

AU - Kimmel, G.

AU - Landau, A.

AU - Shvarts, D.

AU - Zaretsky, E.

PY - 2002/7/1

Y1 - 2002/7/1

N2 - The dynamic behavior of pure titanium was studied in planar impact experiments using a 25-mm pneumatic gun, at impact velocities of 150-550 m/sec. The sample free surface velocity was monitored by VISAR. Softly recovered samples were characterized utilizing XRD, and optical, SEM and TEM microscopy. Metallographic examination of the cross section areas of the impacted samples revealed impact-oriented twins with significantly lower concentration in the direct vicinity of the spall plane. TEM studies revealed dense dislocation areas and twins in the samples, with profound secondary twins and ordered dislocations cells near the spall plane. The results allow estimating the relative contribution of twinning mechanisms in shock-induced plastic deformation of titanium. The differences in the morphology of the area near the spall plane, in contrast to the rest of the sample, implies on alternative deformation mechanisms depending on the loading history.

AB - The dynamic behavior of pure titanium was studied in planar impact experiments using a 25-mm pneumatic gun, at impact velocities of 150-550 m/sec. The sample free surface velocity was monitored by VISAR. Softly recovered samples were characterized utilizing XRD, and optical, SEM and TEM microscopy. Metallographic examination of the cross section areas of the impacted samples revealed impact-oriented twins with significantly lower concentration in the direct vicinity of the spall plane. TEM studies revealed dense dislocation areas and twins in the samples, with profound secondary twins and ordered dislocations cells near the spall plane. The results allow estimating the relative contribution of twinning mechanisms in shock-induced plastic deformation of titanium. The differences in the morphology of the area near the spall plane, in contrast to the rest of the sample, implies on alternative deformation mechanisms depending on the loading history.

KW - Dynamic Characteristics

KW - Impact Velocity

KW - Plastic Deformation

KW - Shock Waves

KW - Strain Rate

KW - Titanium

KW - Twinning

KW - Velocity Measurement

KW - Deformation and plasticity

KW - Metals semimetals and alloys

KW - Grain and twin boundaries

KW - High-pressure and shock wave effects in solids and liquids

U2 - 10.1063/1.1483616

DO - 10.1063/1.1483616

M3 - Article

SN - 0094-243X

VL - 620

SP - 623

EP - 626

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

ER -

Formation and Morphology of Twinning in Titanium under High Strain Rate Deformation

Abstract

Keywords

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