Multi-material component and methods of making thereof

A multi-material and component technology, applied in the field of MULTI-MATERIAL COMPONENTANDME, can solve problems such as deterioration of mechanical properties of joints, embrittlement and cracking of liquid metal, corrosion, etc.

Pending Publication Date: 2021-09-28
HONDA MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, joining aluminum or aluminum-based alloys to steel can lead to the formation of intermetallic compounds that degrade the mechanical properties of the joint and cause corrosion problems, thus requiring additional manufacturing steps or safeguards against mechanical strength degradation and galvanic coupling corrosion
[0004] In addition, when resistance spot welding is used to join iron or steel parts having a coating containing zinc (Zn), such as galvanized and / or galvannealed iron or steel, to other iron or steel parts and / or to dissimilar materials, The low melting point of the coating and the load applied by the welding electrode may cause diffusion of Zn into the iron and / or steel leading to liquid metal embrittlement (LME) cracking

Method used

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  • Multi-material component and methods of making thereof
  • Multi-material component and methods of making thereof
  • Multi-material component and methods of making thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0102] Example 1: Tensile-shear test of resistance spot welding using 370 μm thick HEA interlayer

[0103]High-entropy alloys composed of Fe, Mn, Ni, and Co were prepared using vacuum arc melting. A plurality of high entropy alloy foils each having a thickness of 370 μm were prepared by rolling followed by grinding to a final thickness. Two galvanized annealed steel sheets were then welded via resistance spot welding within the following parameters to form six weld sets: 60 Hz, 8.5 K.amps, 26 cycles, and 770 lbs. Welding groups N-1, N-2 and N-3 were formed without HEA, while welding groups H-1, H-2 and H-3 were provided with HEA as two galvanizing anneals before welding Formed in the absence of interlayers between steel plates. Figure 10 Load (KN) versus displacement (mm) for each sample studied in the tensile-shear test described in Example I is shown.

Embodiment II

[0104] Example II: Fracture Surface after Tensile-Shear Test of Spot Weld Using 370 μm Thick HEA Interlayer

[0105] Figure 11 Optical low magnification photographs of the fracture surface and the top surface of the solder joints of the upper steel plates of samples N-1, N-2 and N-3 are shown. An interfacial shear mode was detected in each sample. Figure 12A Optical low magnification photographs of the fracture surface and top surface of the solder joints of the upper steel plates of samples H-1, H-2 and H-3 are shown. Figure 12B An enlarged portion of the top surface of the solder joint for sample H-2. A mixed fracture mode (pullout + interfacial shear) was detected in each sample. Figure 13 to show relative to Figure 11 and 12 are schematic diagrams showing the tensile stress axis of the plan view.

[0106] Based on Examples I and II, it is concluded that the introduction of the HEA interlayer results in a smaller spot weld area and a partial (50%) pull-out fractur...

Embodiment III

[0107] Example III: Tensile-shear test of resistance spot welding using 220 μm thick HEA interlayer

[0108] High-entropy alloys composed of Fe, Mn, Ni, and Co were prepared using vacuum arc melting. A plurality of high entropy alloy foils each having a thickness of 220 μm were prepared by rolling followed by grinding to a final thickness. Eight weld sets were then formed by welding two plates via resistance spot welding within the following parameters: 60Hz, 9.5K.amps, 26 cycles, and 1000 lbs. Four welded groups were formed without HEA interlayer, while four welded groups were formed with HEA foil provided as an interlayer between two steel plates before welding. Figure 14A The load (k.N) versus displacement (mm) for each sample studied in the tensile-shear test described in Example III is shown. Figure 14B The average breaking load for the two sample groups is shown. from Figure 14A and 14B It can be observed that by reducing the thickness of the HEA interlayer to 22...

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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 materials with high entropy alloys to reduce or eliminate liquid metal embrittlement (LME) cracks.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Patent Application Serial No. 15 / 660,025, filed July 26, 2017, entitled "MULTI-MATERIAL COMPONENT ANDMETHODS OF MAKING THEREOF," which claims the application filed on August 4, 2016, and titled U.S. Provisional Patent Application Serial No. 62 / 371,032, filed September 16, 2016, for "MULTI-MATERIAL COMPONENT AND METHODS OF MAKINGTHEREOF, AND A CONSUMABLE WELDING FILLER AND METHODS OF MAKING AND USINGTHEREOF" OF MAKING THEREOF, AND ACONSUMABLE WELDINGFILLER AND METHODS OF MAKING AND USING THEREOF" and U.S. Provisional Patent Application Serial No. 62 / 395,790, filed June 27, 2017, entitled "MULTI-MATERIAL COMPONENT AND METHODS OFMAKING THEREOF" Applying for the benefit of serial number 62 / 525,314. This application also claims U.S. Provisional Patent Application Serial No. 62 / 802,556, filed February 7, 2019, entitled "MULTI-MATERIAL COMPONENT AND METHODS OF MAKING THEREOF," ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24B23K26/22B32B15/18
CPCB23K11/115B23K11/166B23K9/028B23K9/23B23K10/02B23K15/0053B23K15/0093B23K26/242B23K26/28B23K26/322B23K2101/006B23K2101/18B23K2101/34B23K2103/04B23K35/004B23K35/302B23K35/3026B23K35/3053B23K35/3033B23K35/282C22C30/00C22C30/02C22C30/06
Inventor 胡建勋E·沃克于真真A·阿布德莫塔加里B·施耐德曼
Owner HONDA MOTOR CO LTD
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