High entropy alloy having TWIP/TRIP property and manufacturing method for the same
US10364487B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jun 18, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a high entropy alloy having more improved mechanical properties by controlling contents of additive elements in a NiCoFeMnCr 5-element alloy to control stacking fault energy, thereby controlling stability of a γ austenite phase to control a transformation mechanism, wherein the stacking fault energy is controlled in a composition range of NiaCobFecMndCre (a+b+c+d+e=100, 1≤a≤50, 1≤b≤50, 1≤c≤50, 1≤d≤50, 10≤e≤25, and 77a−42b−22c+73d−100e+2186≤1500), and thus, the γ austenite phase exhibits a twin-induced plasticity (TWIP) property or a transformation induced-plasticity (TRIP) property in which the γ austenite phase is subjected to phase transformation into an ε martensite phase or an α′ martensite phase, under stress, thereby having improved strength and elongation at the same time to have excellent mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.