Aluminium based alloy with a high Young's modulus and high mechanical, strength
US5047092A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1990 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Apr 4, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12799
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns aluminum based alloys of the 7000 series with a high Young'3 s modulus (E.gtoreq.74 GPa), high mechanical strength (R.sub.0.2 .gtoreq.530 MPa in the longitudinal direction), good tenacity (KIC, longitudinal direction .gtoreq.20 MPa.sqroot.m ), and good resistance to corrosion under tension (.sigma..gtoreq.250 MPa in the short transverse direction, durability .gtoreq.30 days ASTM standard G 38-73. The alloy according to the invention is of the following composition by weight: from 5.5 to 8.45% of Zr; from 2 to 3.5% Mg; from 0.5 to 2.5% up to 0.5% Fe; up to 0.5% Si; other elements .ltoreq.0.05% each; and up to 0.15% in all with 0.1.ltoreq.Zr.ltoreq.0.5% 0.3.ltoreq.Cr.ltoreq.0.6%; and 0.3.ltoreq.Mn.ltoreq.1.1%. It is preferably worked by the following process steps: a solid body of the composition claimed above is formed by spray deposition; the body is converted to a worked product, at from 300.degree. to 450.degree. C., the optionally converted cold; and the worked product undergoes heat treatment comprising dissolution, quenching and annealing in a T6 or T7 state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.