Patent ID: 8641840
Filing Date: 2014-02-04
Classification: C21D,C22C

Abstract:
1. A method comprising: (a) supplying a metal alloy comprising Fe at a level of 65.5 to 80.9 atomic percent, Ni at 1.7 to 15.1 atomic percent, B at 3.5 to 5.9 atomic percent, Si at 4.4 to 8.6 atomic percent; (b) melting said alloy and solidifying to provide a crystalline and non-glassy morphology having dendritic morphology and a matrix grain size of 500 nm to 20,000 nm and a boride grain size of 100 nm to 2500 nm; and (c) heating said alloy and forming lath structure including grains of 100 nm to 10,000 nm and boride grain size of 100 nm to 2500 nm and said alloy has a yield strength of 300 MPa to 1400 MPa, tensile strength of 350 MPa to 1600 MPa and elongation of 0-12%