MULTI-MATERIAL COMPONENT AND METHODS OF MAKING THEREOF

• US 20180036840A1
• Filed: 07/26/2017
• Published: 02/08/2018
• Est. Priority Date: 08/04/2016
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: HU, Jianxun, WALKER, Eric
• Granted Patent: US 10,640,854 B2
• Time in Patent Office: Days
• CPC Class Codes: B23K 10/02 Plasma welding
• CPC Class Codes: B23K 15/0093 characterised by the properties of the materials to be welded
• CPC Class Codes: B23K 2101/006 Vehicles
• CPC Class Codes: B23K 2103/20 Ferrous alloys and aluminium or alloys thereof
• CPC Class Codes: B23K 26/323 involving parts made of dissimilar metallic material
• CPC Class Codes: B23K 31/02 relating to soldering or welding dip or wave soldering in the manufacture of printed circuits H05K3/34
• CPC Class Codes: B23K 35/0261 Rods, electrodes, wires
• CPC Class Codes: B23K 35/24 Selection of soldering or welding materials proper B23K35/34 takes precedence
• CPC Class Codes: B23K 35/3033 Ni as the principal constituent
• CPC Class Codes: B23K 9/232 of different metals
• CPC Class Codes: C22C 30/00 Alloys containing less than 50% by weight of each constituent
• CPC Class Codes: Y10T 428/12958 Next to Fe-base component

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.

Claims

1. A multi-material component comprising:

a first member comprising a metal or a metal alloy;

a second member comprising a metal or a metal alloy that is different than the metal or the metal alloy of the first member; and

a third member joining the first member to the second member, the third member comprising a high entropy alloy.

2. The multi-material component of claim 1, wherein the high entropy alloy comprises at least four principal elements, and wherein each of the at least four principal elements comprises from 5 to 35 atomic % of the high entropy alloy.

3. The multi-material component of claim 2, wherein relative amounts of each of the at least four principal elements vary by no more than 5 atomic percent %.

4. The multi-material component of claim 2, wherein the high entropy alloy comprises Fe, Ni, and Cr as principal elements.

5. The multi-material component of claim 2, wherein the high entropy alloy comprises at least one minor element selected from the group consisting of Fe, Co, Ni, Hf, Si, B, Cu, Al, Mg, W, Ta, Nb, Cr, Sn, Zr, Ti, Pd, Au, Pt, Ag, Ru, Mo, V, Re, Bi, Cd, Pb, Ge, Sb, Zn and Mn, and wherein the at least one minor element comprises 0.1 to 5 atomic % of the high entropy alloy.

6. The multi-material component of claim 1, wherein the high entropy alloy consists of a single phase solid solution, and wherein the high entropy alloy is an FCC structure.

7. The multi-material component of claim 1, wherein the third member is at least partially positioned between the first member and the second member, and wherein the first member is spot welded to the third member and the second member is spot welded to the third member.

8. The multi-material component of claim 7, wherein the third member is a sheet.

9. The multi-material component of claim 1, wherein the high entropy alloy comprises a mixing entropy of greater than 1.3R.

10. The multi-material component of claim 1, wherein the high entropy alloy comprises a mixing entropy of greater than 1.5R.

11. The multi-material component of claim 1, wherein the first member is a steel alloy and the second member is a steel alloy that is different from the steel alloy of the first member.

12. The multi-material component of claim 1, wherein the first member is a steel alloy and the second member is an aluminum alloy.

13. A method of making a multi-material component comprising:

providing a first member comprising a metal or a metal alloy;

providing a second member comprising a metal or a metal alloy that is different from the metal or metal alloy of the first member; and

joining the first member to the second member with a third member comprising a high entropy alloy to form the multi-material component.

14. The method of claim 13, wherein the high entropy alloy comprises at least four principal elements, wherein each of the at least four principal elements comprises from 5 to 35 atomic % of the high entropy alloy, wherein relative amounts of each of the at least four principal elements vary by no more than 5 atomic percent %, and wherein the high entropy alloy comprises Fe, Ni, and Cr as principal elements.

15. The method of claim 13, wherein the step of joining the first member to the second member with the third member comprises:

positioning the third member between the first member and the second member; and

spot welding the first member to the third member and spot welding the second member to the third member.

16. The method of claim 15, wherein the third member is in the form of a sheet or foil comprising a thickness of from 0.10 mm to 1.0 mm.

17. The method of claim 13, wherein the third member is a consumable material and the step of joining the first member to the second member with the third member comprises:

melting the consumable material to deposit the high entropy alloy on the first member and the second member.

18. The method of claim 17, wherein the consumable material is melted by electron beam welding, laser beam welding, plasma arc welding, gas metal arc welding, gas tungsten arc welding, laser cladding, flux cored arc welding, or submerged arc welding.

19. The method of claim 18, wherein the consumable material is in the form of a wire.

20. The method of claim 13, wherein the high entropy alloy joining the first member to the second member comprises an FCC structure.