Structures and methods of manufacture of microstructures within a structure to selectively adjust a response or responses of resulting structures or portions of structures to shock induced deformation or force loading

Patent metadata

Field	Value
Publication number	US-9617612-B2
Application number	US-201514593392-A
Country	US
Kind code	B2
Filing date	Jan 9, 2015
Priority date	Jan 9, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

Structures and methods of manufacturing utilizing direction of force loading or shock induced deformation of structures including microstructures produced in accordance with embodiments of the invention are provided. In one example, a method of manufacturing and structure including providing a metallic plate; forming said plate such that an original longitudinal direction of rolling the plate is perpendicular to a long direction of the plate, thus a force load on the plate would then be distributed over the longitudinal direction.

First claim

The invention claimed is:

1. A method of designing and manufacturing microstructures within a structure comprising:
defining a structure assembly comprising a plurality of sections including a first structure;
defining a first loading force with a predetermined orientation to a selected location or portion of the structure assembly comprising the first structure;
defining or determining a desired shock induced deformation structural result or force loading structural response in the first structure with respect to the structure assembly;
determining at least one plurality of first microstructures in said first structure at said selected location or portion of the first structure that produce said shock induced deformation structural result or said force loading structural response after application of said first loading force, said shock induced structural deformation structural result or force loading structural response comprising a direction of material flow within said first structure having said at least one plurality of first microstructures that is produced upon application of said first force loading; wherein said first microstructures are formed having a microstructure orientation that will either increase or decrease resistance to deformation at the selected location or portion caused by application of the first force loading at the predetermined orientation at the selected location or portion of the first structure, wherein said first microstructures comprises an elongated or stretched grain shape and microstructure orientation at the selected location or portion relative to the first force loading, wherein required microstructures at the selected location or portion comprises an elongation or stretching of the first structure's material grains in the selected location or portion of the first structure where the elongation or stretching of the material grain is produced to align with an alteration plane that is defined by a predetermined angle with respect to a vector of the first force loading at said selected location or portion of the structure; and
manufacturing said first structure with manufacturing-derived microstructures comprising said first microstructures by pressing or rolling the first structure at said selected location or portion of the first structure to produce the elongation or stretching of the material grain at said predetermined angle, wherein said first structure thereby produced comprises said first microstructures having said grains elongated into narrow bands aligned with the direction of material flow produced in response to the first force loading and the first force loading direction.

2. The method of claim 1 , wherein said manufacturing includes a forging step.

3. A method of manufacturing a structure with microstructures having a predetermined material flow in at least one section of the structure in response to subsequent shock or loading force comprising:
determining one or more material grain alterations in a structure that creates different microstructures in at least one section of the structure comprising elongation or stretching of polycrystalline or material grain in said structure that create a different material flow than other sections of the structure based on design parameters comprising a first force loading, a first force loading direction produced by said first force loading above a first predetermined force value, and a desired or predetermined direction of said material flow within said structure produced upon application of said first force loading at a first vector associated with said first force loading with respect to the structure;
providing a metallic plate to be formed into said structure with said microstructures; and
forming said one or more material grain alterations in said at least one section of said metallic plate by pressing or rolling at least one portion of said metallic plate to produce the elongation or stretching of the metallic plate's material grains to produce elongated grains that are elongated into narrow bands aligned with the desired or predetermined direction of material flow of said structure produced in response to the first force loading and the first force loading vector.

4. The method of claim 3 , wherein said forming one or more material grain alterations by elongating or stretching of the material grains comprises forming said metallic plate by cold rolling or working the metallic plate such that a longitudinal direction of rolling the plate is perpendicular to a long direction of the plate, thus a load on the plate would then be distributed over the longitudinal direction.

5. The method of claim 3 , wherein said metallic plate is formed as a shaped charge liner, wherein manufacturing said structure with manufacturing-derived material grain alterations comprises an altered microstructure affecting the shaped charge's liner collapse and shaped charge jet formation from the liner as it collapses towards a focus point of the jet such that the microstructure comprises grains elongated into narrow bands aligned with the desired direction of material flow to orient the material flow towards the focus point.

Assignees

• Us Navy

Inventors

• Scheid Eric

Classifications

• C21D7/00 Primary

  Modifying the physical properties of iron or steel by deformation (apparatus for mechanical working of metal B21, B23, B24) · CPC title

• C22F1/04

  of aluminium or alloys based thereon · CPC title

• C21D2201/05

  Grain orientation · CPC title

• C21D7/02

  by cold working · CPC title

• F42B1/032

  characterised by the material of the liner · CPC title