Process for producing high strength and high toughness aluminum alloy, and alloy material
US5256215A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing a high strength and high toughness aluminum alloy comprises a first step of preparing an alloy material which has a primary metallographic structure with a volume fraction Vf of a single-phase structure of at least 90%, said single-phase structure is comprised of crystal particles having a particle size of less than 30 nm and an fcc structure (face-centered cubic structure), the alloy having a composition represented by a chemical formula: EQU Al .sub.a T .sub.b X.sub.c wherein T is at least one element selected from a first group including Y, La, Ce, Mm (misch metal) and Ca; X is at least one element selected from a second group including Fe, Co and Ni (but at least one element of Co and Ni, if only Y is selected from the first group); and each of a, b and c represents an atom %, with the proviso that 85.ltoreq.a.ltoreq.97, 1.ltoreq.b.ltoreq.10, and 2.ltoreq.c.ltoreq.15, and a second step of subjecting the alloy material to a thermal treatment at a temperature in a range .+-.100.degree. C. of the temperature of destruction of the single-phase structure to destroy the single-phase structure, thereby providing a second metallographic structure having a combin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.