Heterogeneous shock-energy deposition in shock-wave consolidation of metal powders

Miscellaneous · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5467063

Mutz, A H

Shock-wave consolidation of powder is a high deformation rate process in which a shock wave generated by an explosive or a colliding projectile rapidly densifies and bonds together the powder particles into a solid compact. Deposition of the shock energy during this process is highly inhomogeneous on the powder particle scale. Evidence of the extent and pattern of the energy deposition was provided by recovery experiments performed using a crystalline metallic-glass-forming alloy, and analyzed using a heat-flow model. The energy deposited during the shock-wave passage was best modeled as deposited partly into the particle bulk and partly onto particle surfaces. To investigate this inhomogeneity, and the powder parameters that influence it, a propellant-driven gas gun was designed, built, and utilized. Compaction experiments were performed on a Ni-based super alloy and on a SiC-reinforced Ti-matrix composite to test some of the practical applications of the process and the target designs developed. Superior tensile properties were observed in the shock-consolidated and heat-treated Ni-based 718 alloy. The SiC reinforced composite was recovered in the intended net shape with no macro-cracks in the compact body, but with fractured SiC particles.

• Research Organization: California Inst. of Tech., Pasadena, CA (United States)
• OSTI ID: 5467063
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
COMPACTING
HEAT RESISTING ALLOYS
NICKEL BASE ALLOYS
SILICON CARBIDES
TITANIUM ALLOYS
ENERGY TRANSFER
MATRIX MATERIALS
METALS
POWDER METALLURGY
POWDERS
REINFORCED MATERIALS
SHOCK WAVES
ALLOYS
CARBIDES
CARBON COMPOUNDS
ELEMENTS
HEAT RESISTANT MATERIALS
MATERIALS
METALLURGY
NICKEL ALLOYS
SILICON COMPOUNDS
360101* - Metals & Alloys- Preparation & Fabrication
360601 - Other Materials- Preparation & Manufacture