Projectile using shape-memory alloy to improve impact energy transfer
First Claim
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1. A projectile, comprising:
- a core; and
deforming means of shape-memory alloy in operative contact with said core, said deforming means altering the geometric shape of said core upon impact of the projectile due to shape-memory effect to improve the impact energy transfer of the projectile.
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Abstract
A projectile having an active component of shape-memory alloy that will not distort the projectile'"'"'s shape or balance during launch or flight but which will alter the projectile shape upon impact to increase energy transfer efficiency against targets is disclosed.
14 Citations
13 Claims
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1. A projectile, comprising:
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a core; and deforming means of shape-memory alloy in operative contact with said core, said deforming means altering the geometric shape of said core upon impact of the projectile due to shape-memory effect to improve the impact energy transfer of the projectile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. A projectile of shape-memory alloy wherein said shape-memory alloy has a martensitic state and an austenitic state, said projectile being dimensionally deformed prior to impact while said shape-memory alloy is in its martensitic state, a change from its martensitic state to its austenitic state recovering said projectile upon impact due to shape-memory effect to its non-deformed dimension to alter the geometric shape of the projectile to improve the impact energy transfer of the projectile.
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12. A projectile, comprising:
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a core having a longitudinal axis; and deforming means of shape-memory alloy being in operative contact with said core and being generally contained within said core, said shape-memory alloy having a martensitic state and an austenitic state, said deforming means comprising a rod that is dimensionally deformed prior to impact into general axial alignment with said longitudinal axis when said shape-memory alloy is in its martensitic state, a change from its martensitic state to its austenitic state recovering said rod upon impact to its non-deformed dimension to be out of column to alter the geometric shape of said core due to shape-memory effect to improve the impact energy transfer of the projectile.
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13. A projectile, comprising:
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a core having a longitudinal axis and including a cutting head; and deforming means of shape-memory alloy being in operative contact with said core and being contained within said cutting head and being in general axial alignment with said longitudinal axis, said shape-memory alloy having a martensitic state and an austenitic state, said deforming means being dimensionally deformed prior to impact while said shape-memory alloy is in its martensitic state, a change from its martensitic state to its austenitic state recovering said deforming means upon impact to its non-deformed dimension, radially expanding said cutting head with respect to said longitudinal axis due to shape-memory effect, increasing the cross-section of the cutting head to improve the impact energy transfer of the projectile.
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Specification