US2022112580A1PendingUtilityA1

High Entropy Alloy with Low Specific Gravity

56
Assignee: HYUNDAI MOTOR CO LTDPriority: Oct 13, 2020Filed: May 6, 2021Published: Apr 14, 2022
Est. expiryOct 13, 2040(~14.2 yrs left)· nominal 20-yr term from priority
Inventors:Hoo Dam LeeKyung Sik ChoiTae Gyu LeeByung Ho Min
C22C 19/03C22C 30/00C22C 19/056C22F 1/10C22C 19/058C22C 19/05
56
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A high-entropy alloy with a low specific gravity includes Fe: 16.7 to 25 at %, Cr: 10.5 to 20.6 at %, Al: 12.7 to 18 at %, remaining Ni, and impurities. The high-entropy alloy includes microstructures of a body-centered cubic (BCC) and a face-centered cubic (FCC) formed together, wherein a fraction of the FCC of the high-entropy alloy is 50 to 80%.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A high-entropy alloy with a low specific gravity, the high-entropy alloy comprising Fe: 16.7 to 25 at %, Cr: 10.5 to 20.6 at %, Al: 12.7 to 18 at %, remaining Ni, and impurities. 
     
     
         2 . The high-entropy alloy according to  claim 1 , wherein the high-entropy alloy comprises Cr: 15 to 18 at %. 
     
     
         3 . The high-entropy alloy according to  claim 1 , wherein the high-entropy alloy comprises Al: 16 to 17 at %. 
     
     
         4 . The high-entropy alloy according to  claim 1 , wherein the high-entropy alloy further comprises Ti: 0.8 to 1 at %. 
     
     
         5 . The high-entropy alloy according to  claim 1 , wherein the high-entropy alloy contains the impurities of 0.1 at % or less. 
     
     
         6 . The high-entropy alloy according to  claim 1 , wherein a Ni:Fe content (at %) ratio of the high-entropy alloy is 2:1 to 3:1. 
     
     
         7 . The high-entropy alloy according to  claim 1 , wherein the high-entropy alloy includes microstructures of a body-centered cubic (BCC) and a face-centered cubic (FCC) formed together. 
     
     
         8 . The high-entropy alloy according to  claim 7 , wherein a fraction of the FCC of the high-entropy alloy is 50 to 80%. 
     
     
         9 . The high-entropy alloy according to  claim 8 , wherein a sigma phase is not formed in the high-entropy alloy. 
     
     
         10 . The high-entropy alloy according to  claim 8 , wherein an intermetallic compound is not formed in the high-entropy alloy. 
     
     
         11 . The high-entropy alloy according to  claim 1 , wherein the high-entropy alloy has a specific gravity of 6.92 to 7.04 g/cm 3 . 
     
     
         12 . The high-entropy alloy according to  claim 1 , wherein the high-entropy alloy has a yield strength at room temperature of 670 to 700 MPa, and a tensile strength of 880 to 920 MPa. 
     
     
         13 . The high-entropy alloy according to  claim 1 , wherein a Rockwell hardness of the high-entropy alloy at 600° C. is 20 to 43 HRC. 
     
     
         14 . The high-entropy alloy according to  claim 13 , wherein the Rockwell hardness at 600° C. is 38 to 43 HRC. 
     
     
         15 . A high-entropy alloy with a low specific gravity comprising Fe, Cr, Al, and Ni, wherein microstructures of a body-centered cubic (BCC) and a face-centered cubic (FCC) are formed together, and a fraction of the FCC is 50 to 80%. 
     
     
         16 . The high-entropy alloy according to  claim 15 , wherein a sigma phase is not formed in the high-entropy alloy. 
     
     
         17 . The high-entropy alloy according to  claim 15 , wherein an intermetallic compound is not formed in the high-entropy alloy. 
     
     
         18 . The high-entropy alloy according to  claim 15 , wherein the high-entropy alloy comprises Fe: 16.7 to 25 at %, Cr: 10.5 to 20.6 at %, Al: 12.7 to 18 at %, remaining Ni, and impurities. 
     
     
         19 . The high-entropy alloy according to  claim 18 , wherein the high-entropy alloy further comprises Ti: 0.8 to 1 at %. 
     
     
         20 . The high-entropy alloy according to  claim 18 , wherein the high-entropy alloy contains the impurities of 0.1 at % or less.

Join the waitlist — get patent alerts

Track US2022112580A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.