公开(公告)号：US11041704B1

公开(公告)日：2021-06-22

申请号：US15658974

申请日：2017-07-25

Applicant: U.S. Government as Represented by the Secretary of the Army

Inventor： Michael E. Ellis ,  Michael V. Bruno ,  Deepak Kapoor ,  Tony F. Zahrah ,  Roderick Rowland ,  Steven C. Lawver

IPC: F42B12/32 ,  F42B33/00 ,  B22F3/15 ,  B22F7/08 ,  B22F3/24 ,  B33Y80/00

Abstract: A method for preparing a composite projectile body with preformed fragments precisely embedded within the walls of the projectile body. The process utilizes a combination of additive manufacturing and advanced powder metallurgy fabrication techniques. Specifically a skeletal structure or prefabricated cage body is filled with preformed fragments. The cage structure may be situated on a mandrel or tool inside a container. The container is filled with metal powder, degassed under vacuum, and sealed. The canister is then subjected to heat and pressure to consolidate the powder to full density. The canister is then removed and the compacted billet product is further machined to obtain a desired projectile body.

公开(公告)号：US10712137B1

公开(公告)日：2020-07-14

申请号：US16395632

申请日：2019-04-26

Applicant: U.S. Government as Represented by the Secretary of the Army

Inventor： Joshua McGowan ,  Michael E. Ellis ,  Tony Zahrah ,  Deepak Kapoor ,  Steven Lawver ,  Sergio Torrejon ,  Roderick Rowland ,  John Brough ,  James Grzybek

IPC: F42B12/32 ,  B22F3/15

Abstract: Process for making a fragmentation warhead using hot isostatic pressing where tungsten spheres, powdered steel, and interlock features on a mandrel are consolidated in a matrix. Then in the finished part, the front fragmentation cap, rear and interior geometries are machined, resulting in a finished warhead with an enhanced performance fragmentation cap integrally bonded to it.