Multi-material component and methods of making thereof

Patent metadata

Field	Value
Publication number	US-11535913-B2
Application number	US-202016844786-A
Country	US
Kind code	B2
Filing date	Apr 9, 2020
Priority date	Aug 4, 2016
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A multi-material component joined by a high entropy alloy is provided, as well as methods of making a multi-material component by joining dissimilar materials with high entropy alloys.

First claim

What is claimed is:

1. A multi-material component comprising:
a first member comprising a first steel, wherein the first member comprises a coating;
a second member comprising a second steel that is a different composition than the first steel; and
a third member welded to the first member and the second member, the third member comprising a high entropy alloy, the high entropy alloy is a solid solution comprising a face-centered cubic single phase solid solution or a body-centered cubic single phase solid solution, or a combination of face-centered cubic and body-centered cubic phases, the high entropy alloy comprises at least four principal elements,
wherein each of the at least four principal elements comprises at least 5 atomic % of the high entropy alloy, relative amounts of each of the at least four principal elements vary no more than 15 atomic %, and the high entropy alloy comprises a mixing entropy of greater than 1.3R, wherein the entropy of mixing is determined using the equation ΔSmix=RlnN, wherein R is the gas constant and N is the total number of elements.

2. The multi-material component of claim 1 , wherein the first steel comprises Mn, and wherein the high entropy alloy of the third member comprises Mn as one of the at least four principal elements.

3. The multi-material component of claim 2 , wherein the first steel comprises Mn as the second most abundant element of the first steel.

4. The multi-material component of claim 2 , wherein the coating of the first member comprises Zn.

5. The multi-material component of claim 4 , wherein the second member comprises a coating, wherein the coating of the second member comprises Al and Si.

6. The multi-material component of claim 5 , wherein the second steel comprises Mn as the second most abundant element of the second steel.

7. The multi-material component of claim 6 , wherein the high entropy alloy of the third member comprises Fe as one of the at least four principal elements.

8. A multi-material component comprising:
a first member comprising a first steel, wherein the first member comprises a coating;
a second member comprising a second steel that is a different composition than the first steel; and
a third member welded to the first member and the second member, the third member comprising a high entropy alloy, the high entropy alloy is a solid solution comprising a face-centered cubic single phase solid solution or a body-centered cubic single phase solid solution, or a combination of face-centered cubic and body-centered cubic phases, the high entropy alloy comprises at least four principal elements and two of the at least four principal elements are Mn and Fe,
wherein each of the at least four principal elements comprises at least 5 atomic % of the high entropy alloy, the at least four principal elements comprise at least 70 atomic % of the high entropy alloy, and the high entropy alloy comprises a mixing entropy of greater than 1.3R, wherein the entropy of mixing is determined using the equation ΔSmix=RlnN, wherein R is the gas constant and N is the total number of elements.

9. The multi-material component of claim 8 , wherein the coating of the first member comprises Zn.

10. The multi-material component of claim 9 , wherein the first steel comprises Mn.

11. The multi-material component of claim 10 , wherein the first steel comprises Mn as the second most abundant element of the first steel.

12. The multi-material component of claim 11 , wherein the first steel is a dual phase steel.

13. The multi-material component of claim 12 , wherein the second member comprises a coating, wherein the coating of the second member comprises Al and Si.

14. A multi-material component comprising:
a first member comprising a first steel, wherein the first member comprises a coating, and wherein the coating of the first member comprises at least Zn, Al or Si;
a second member comprising a second steel that is a different composition than the first steel; and
a third member welded to the first member and the second member, the third member comprising a high entropy alloy, the high entropy alloy is a solid solution comprising a face-centered cubic single phase solid solution or a body-centered cubic single phase solid solution, or a combination of face-centered cubic and body-centered cubic phases, the high entropy alloy comprises at least four principal elements,
wherein each of the at least four principal elements comprises at least 5 atomic % of the high entropy alloy, relative amounts of each of the at least four principal elements vary no more than 15 atomic %, and the high entropy alloy comprises a mixing entropy of greater than 1.3R, wherein the entropy of mixing is determined using the equation ΔSmix=RlnN, wherein R is the gas constant and N is the total number of elements.

15. The multi-material component of claim 14 , wherein the first steel comprises Mn as the second most abundant element of the first steel.

16. The multi-material component of claim 15 , wherein the second steel comprises Mn as the second most abundant element of the second steel.

17. The multi-material component of claim 16 , wherein the high entropy alloy of the third member comprises Mn as one of the at least four principal elements.

18. The multi-material component of claim 17 , wherein the first steel is a dual phase steel.

19. The multi-material component of claim 18 , wherein the coating of the first member comprises Zn.

20. The multi-material component of claim 19 , wherein the third member is positioned between the first member and the second member, and wherein the first member and the second member are spot welded to the third member.

Assignees

• Honda Motor Co Ltd

Inventors

• Hu Jianxun
• Walker Eric

Classifications

• B23K35/0261

  Rods, electrodes or wires · CPC title

• B23K31/02 Primary

  relating to soldering or welding · CPC title

• B23K2101/006

  Vehicles · CPC title

• C22C30/00 Primary

  Alloys containing less than 50% by weight of each constituent · CPC title

• B23K2103/18

  Dissimilar materials · CPC title