IP Library › Granted Patent US 12,404,569
Granted Patent B2
US 12,404,569 · App. 17/764,389 · Granted Sep 2, 2025

Magnesium alloys and methods of making and use thereof

Inventors: Aihua Luo (Westerville, OH); Renhai Shi (Beijing, CN)
Assignee: Ohio State Innovation Foundation
C22C23/04C22C23/00C22C23/02C22F1/06
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,404,569
App. No.
17/764,389
Granted
Sep 2, 2025
Kind
B2
Abstract

Disclosed herein are magnesium alloys and methods of making and use thereof. The magnesium alloys comprise: from 1 to 1.5 wt % Zn, from 1 to 1.4 wt. % Al, from 0.2 to 0.7 wt % Ca, from 0.2 to 0.4 wt % Ce, from 0.1 to 0.8 wt % Mn, and the balance comprising Mg.

Claims (23)

1. A magnesium alloy comprising:

from 1 to 1.25 wt. % Zn,

from 1 to 1.4 wt. % Al,

from 0.2 to 0.45 wt. % Ca,

from 0.2 to 0.4 wt. % Ce,

from 0.1 to 0.8 wt. % Mn, and

the balance comprising Mg.

2. The magnesium alloy of claim 1 , wherein the magnesium alloy comprises from 1 to 1.2 wt. % Al.

3. The magnesium alloy of claim 1 , wherein the magnesium alloy comprises from 0.2 to 0.4 wt. % Ca.

4. The magnesium alloy of claim 1 , wherein the magnesium alloy comprises from 0.2 to 0.3 wt. % Ce.

5. The magnesium alloy of claim 1 , wherein the magnesium alloy comprises from 0.2 to 0.6 wt. % Mn.

6. The magnesium alloy of claim 1 , wherein the magnesium alloy comprises from 1 to 1.25 wt. % Zn, from 1 to 1.2 wt. % Al, from 0.2 to 0.45 wt. % Ca, from 0.2 to 0.3 wt. % Ce, from 0.2 to 0.6 wt. % Mn, and the balance comprising Mg.

7. The magnesium alloy of claim 1 , wherein the Zn, Al, Ca, Ce, and Mn are substantially dissolved in the magnesium alloy.

8. The magnesium alloy of claim 1 , wherein the magnesium alloy is microalloyed.

9. The magnesium alloy of claim 1 , wherein the magnesium alloy has a yield strength of 200 MPa or more, an elongation to failure of 25% or more, or a combination thereof.

10. The magnesium alloy of claim 1 , wherein the magnesium alloy has an Index Erichsen value of 6 mm or more at room temperature.

11. The magnesium alloy of claim 1 , wherein the magnesium alloy has an average grain size of from 5 μm to 14 μm.

12. An object comprising the magnesium alloy of claim 1 .

13. The object of claim 12 , wherein the object comprises a sheet and the sheet has an average thickness of from 0.5 mm to 5 mm.

14. The magnesium alloy of claim 1 , wherein the magnesium alloy has an elongation to failure of 25% or more.

15. The magnesium alloy of claim 1 , wherein the magnesium alloy has an elongation to failure of 25% or more and a yield strength of 200 MPa or more.

16. The magnesium alloy of claim 1 , wherein the magnesium alloy is substantially free of Al 4 Mn, Ca 2 Mg 5 Zn 5 , Al 11 Mn 4 , Al 2 Ca, AlCaMg, or a combination thereof.

17. The magnesium alloy of claim 1 , wherein the magnesium alloy is substantially free of Al 2 Ca.

Assignments (2)
CONFIRMATORY LICENSE Recorded May 24, 2022
From: OHIO STATE UNIVERSITY
To: UNITED STATES DEPARTMENT OF ENERGY
Reel/Frame 060173/0511 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2022
From: LUO, AIHUA; SHI, RENHAI
To: OHIO STATE INNOVATION FOUNDATION
Reel/Frame 059417/0356 →
Continuity (2)
Provisional Application 62908077 · Sep 30, 2019
Related Publication 20220341006A1 · Oct 27, 2022
References Cited (31)
US 5855697A · Luo et al. · 1999 [cited by applicant]
US 20020102179A1 · Murai et al. · 2002 [cited by applicant]
US 20090116994A1 · Luo et al. · 2009 [cited by applicant]
US 20140238192A1 · Otsuka · 2014 [cited by examiner]
US 20190085433A1 · Sung et al. · 2019 [cited by applicant]
CN 108385008A · 2018 [cited by examiner]
CN 110066948B · 2019 [cited by examiner]
WO 2014145672A1 · 2014 [cited by applicant]
WO 2017112779A1 · 2017 [cited by applicant]
WO 2021040988A1 · 2021 [cited by applicant]
English Abstract and English Machine Translation of Dai et al. (CN 110066948 B) (Jul. 30, 2019). [cited by examiner]
English Abstract and English Machine Translation of Chen (CN 108385008 A) (Aug. 10, 2018). [cited by examiner]
Atwell, D.L. and Barnett, M.R., 2007. Extrusion limits of magnesium alloys. Metallurgical and Materials Transactions A, 38(12), pp. 3032-3041. [cited by applicant]
Lei et al. Comparison of the Strain Rate Sensitivity in AZ31 and WE43 Magnesium Alloys under Different Loading Conditions, Crystals, 2023, 13, 554. [cited by applicant]
Luo AA et al. Creep and microstructure of magnesium-aluminum-calcium based alloys. Metall. Mater. Trans. A 33(3), 567 (2002). [cited by applicant]
Shi R et al. A new magnesium sheet alloy with high tensile properties and room-temperature formability. Sci. Rep. 10 (1), 1 (2020). [cited by applicant]
Zehnder C et al. Plastic deformation of single crystalline C14 Mg2Ca Laves phase at room temperature. Mater. Sci. Eng. A, 2019, 759, 754. [cited by applicant]
Zhong Y et al. Laves Phases in Mg—Al—Ca Alloys, Magnesium Technology, 2004, pp. 317-323. [cited by applicant]
International Search Report and Written Opinion, issued by the International Searching Authority (ISA/US) in PCT Application No. PCT/US2020/053065 on Dec. 15, 2020. 10 pages. [cited by applicant]
Bian et al. “A heat-treatable Mg—Al—Ca—Mn—Zn sheet alloy with good room temperature formability,” Scripta Materialia, 2017, 138, 151-155. [cited by applicant]
Liu et al. “Designing Mg alloys with high ductility: Reducing the strength discrepancies between soft deformation modes and hard deformation modes,” Acta Materialia, 2017, 141, 1-9. [cited by applicant]
Luo et al. “High-ductility magnesium-zinc-cerium extrusion alloys,” Scripta Materialia, 2011, 64, 410-413. [cited by applicant]
Luo, “Recent magnesium alloy development for elevated temperature applications”, International Materials Reviews 2004, 49(1), 13-30. [cited by applicant]
Luo, AA. “Material design and development: From classical thermodynamics to CALPHAD and ICME approaches,” CALPHAD, 2015, 50, 6-22. [cited by applicant]
Robson et al. “Particle effects on recrystallization in magnesium-manganese alloys: Particle-stimulated nucleation,” Acta Materialia 2009, 57(9), 2739-2747. [cited by applicant]
Sandlöbes et al. “The relation between ductility and stacking fault energies in Mg and Mg—Y alloys,” Acta Materialia 2012, 60, 3011-3021. [cited by applicant]
Sasaki et al. “Strong and ductile heat-treatable Mg—Sn—Zn—Al wrought alloys,” Acta Materialia 2015, 99, 176-186. [cited by applicant]
Xu et al. “High-strength extruded Mg—Al—Ca—Mn alloys.” Scripta Materialia 2011, 65(3), 269-272. [cited by applicant]
Zeng et al. “Texture evolution during static recrystallization of cold-rolled magnesium alloys,” Acta Materialia, 2016, 105, 479-494. [cited by applicant]
Zeng et al. “Achieving exceptionally high strength in Mg—3Al—1Zn—0.3Mn extrusions via suppressing intergranular deformation,” Acta Materialia 2018, 160, 97-108. [cited by applicant]
Zhang et al. “Enhanced mechanical properties in fine-grained Mg—1.0Zn—0.5Ca alloys prepared by extrusion at different temperatures,” Scripta Materialia 2010, 63(10), 1024-1027. [cited by applicant]