Patents by Inventor Aihua Luo
Aihua Luo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240060158Abstract: Disclosed herein are aluminum alloys and methods of making and use thereof.Type: ApplicationFiled: February 25, 2022Publication date: February 22, 2024Inventors: Aihua LUO, Emre CINKILIC, Michael MOODISPAW
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Publication number: 20230160038Abstract: Disclosed herein are metal matrix composites and methods of making and use thereof. For example, disclosed herein are methods of making a metal matrix composite comprising a metal matrix reinforced by a high entropy alloy. The methods comprise mixing a first powder and a second powder to form a powder mixture, wherein the first powder comprises a plurality of particles comprising a metal and the second powder comprises a plurality of particles comprising a high entropy alloy. The methods further comprise compacting the powder mixture to form a pellet and adding the pellet to a molten metal, the molten metal comprising the metal in a molten state, thereby melting the pellet to form a molten mixture. The methods further comprise subjecting the molten mixture to an ultrasonic treatment and casting the ultrasonic treated mixture to form the metal matrix composite.Type: ApplicationFiled: November 17, 2022Publication date: May 25, 2023Inventors: Aihua Luo, Xuejun Huang, Jianyue Zhang
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Publication number: 20220341006Abstract: 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.Type: ApplicationFiled: September 28, 2020Publication date: October 27, 2022Inventors: Aihua LUO, Renhai SHI
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Publication number: 20220275477Abstract: Disclosed herein are magnesium alloy based objects and methods of making and use thereof. For example, disclosed herein are methods of making a magnesium alloy based object, the methods comprising: heating an object comprising a preliminary magnesium alloy at a first temperature for a first amount of time, the preliminary magnesium alloy comprising a first intermetallic phase, a second intermetallic phase, and an alloy phase, to thereby substantially dissolving the first intermetallic phase into the alloy phase to form an object comprising an intermediate magnesium alloy, the intermediate magnesium alloy comprising the second intermetallic phase and the alloy phase; and heating the object comprising the intermediate magnesium alloy at a second temperature for a second amount of time to thereby substantially dissolving the second intermetallic phase into the alloy phase and minimizing incipient melting of the alloy phase to form the magnesium alloy based object.Type: ApplicationFiled: August 6, 2020Publication date: September 1, 2022Inventors: Aihua LUO, Thomas AVEY
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Patent number: 11168385Abstract: The present disclosure relates to relates generally to metal alloys. The present disclosure relates more particularly to High Entropy Alloys having relatively high strength and relatively low weight. In one aspect, the present disclosure provides a multiple-principal-element high-entropy AlCrTiV metal alloy comprising Al in an amount of 5-50 at %; Cr in an amount of 5-50 at %; Ti in an amount of 5-60 at %; and V in an amount of 5-50 at %, wherein the total amount of Al, Cr, Ti and V is at least 80 at %.Type: GrantFiled: November 1, 2017Date of Patent: November 9, 2021Assignee: Ohio State Innovation FoundationInventors: Aihua Luo, Weihua Sun, Xuejun Huang
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Publication number: 20180119255Abstract: The present disclosure relates to relates generally to metal alloys. The present disclosure relates more particularly to High Entropy Alloys having relatively high strength and relatively low weight. In one aspect, the present disclosure provides a multiple-principal-element high-entropy AlCrTiV metal alloy comprising Al in an amount of 5-50 at %; Cr in an amount of 5-50 at %; Ti in an amount of 5-60 at %; and V in an amount of 5-50 at %, wherein the total amount of Al, Cr, Ti and V is at least 80 at %.Type: ApplicationFiled: November 1, 2017Publication date: May 3, 2018Inventors: Aihua Luo, Weihua Sun, Xuejun Huang
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Patent number: 9593396Abstract: A tin-containing magnesium-aluminum-manganese (Mg—Al—Mn) based alloy that provides a desired combination of strength and ductility so as to be particularly suited for structural applications. The alloy includes magnesium, aluminum, and manganese in combination and about 0.5% to about 3.5% tin. The tin addition improves strength without substantial loss of ductility.Type: GrantFiled: May 16, 2007Date of Patent: March 14, 2017Assignee: GM Global Technology Operations LLCInventors: Aihua A. Luo, Anil K. Sachdev
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Patent number: 9481034Abstract: Methods of forming bi-metallic castings are provided. In one method, a metal preform of a desired base shape is provided defining a substrate surface. A natural oxide layer is removed from the substrate surface, yielding a cleaned metal preform. The method includes forming a thin metallic film on at least a portion of the substrate surface of the cleaned metal preform, and metallurgically bonding the portion of the metal preform having the metallic film with an overcast metal to form a bi-metallic casting. The metallic film promotes a metallurgical bond between the metal preform and the overcast metal. In one aspect, the metal preform may include aluminum (Al) and the metallic film may include zinc (Zn).Type: GrantFiled: December 6, 2013Date of Patent: November 1, 2016Assignee: GM Global Technology Operations LLCInventors: Yiqing Chen, Aihua A. Luo, Anil K. Sachdev
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Patent number: 8992696Abstract: A method of bonding a metal to a substrate involves forming a plurality of nano-features in a surface of the substrate, where each nano-feature is chosen from a nano-pore and/or a nano-crevice. In a molten state, the metal is over-cast onto the substrate surface, and penetrates the nano-features. Upon cooling, the metal is solidified inside the nano-features, where the solidification of the metal forms a mechanical interlock between the over-cast metal and the substrate.Type: GrantFiled: December 2, 2011Date of Patent: March 31, 2015Assignee: GM Global Technology Operations LLCInventors: Michael J. Walker, Bob R. Powell, Jr., Aihua A. Luo
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Patent number: 8852359Abstract: A method of bonding a metal to a substrate involves forming an oxide layer on a surface of the substrate, and in a molten state, over-casting the metal on the substrate surface. The over-casting drives a reaction at an interface between the over-cast metal and the oxide layer to form another oxide. The other oxide binds the metal to the substrate surface upon solidification of the over-cast metal.Type: GrantFiled: December 2, 2011Date of Patent: October 7, 2014Assignee: GM Global Technology Operations LLCInventors: Michael J. Walker, Anil K. Sachdev, Bob R. Powell, Jr., Aihua A. Luo
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Publication number: 20140290894Abstract: Methods of forming bi-metallic castings are provided. In one method, a metal preform of a desired base shape is provided defining a substrate surface. A natural oxide layer is removed from the substrate surface, yielding a cleaned metal preform. The method includes forming a thin metallic film on at least a portion of the substrate surface of the cleaned metal preform, and metallurgically bonding the portion of the metal preform having the metallic film with an overcast metal to form a bi-metallic casting. The metallic film promotes a metallurgical bond between the metal preform and the overcast metal. In one aspect, the metal preform may comprise aluminum (Al) and the metallic film may comprise zinc (Zn).Type: ApplicationFiled: December 6, 2013Publication date: October 2, 2014Inventors: Yiqing Chen, Aihua A. Luo, Anil K. Sachdev
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Patent number: 8668247Abstract: A segmented tube formed of a magnesium-based alloy and wrapped or jacketed with a reinforcement to apply a restraining force on the external surface of the tube for resisting fragmentation of the tube by the compressive force applied to the end of the tube serves as a structural member for receiving a compressive stress applied to an end of the tube and acting along the axis of the tube toward the opposing end of the tube. The magnesium alloy tube is comparatively light, and the segmented and wrapped or jacketed tube has an increased capacity to absorb compressive forces. The tubes are useful as components of automotive vehicles.Type: GrantFiled: April 23, 2012Date of Patent: March 11, 2014Assignee: GM Global Technology Operations LLCInventors: Hamid G. Kia, Aihua A. Luo, John N. Owens, James F. Quinn
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Publication number: 20130278016Abstract: A segmented tube formed of a magnesium-based alloy and wrapped or jacketed with a reinforcement to apply a restraining force on the external surface of the tube for resisting fragmentation of the tube by the compressive force applied to the end of the tube serves as a structural member for receiving a compressive stress applied to an end of the tube and acting along the axis of the tube toward the opposing end of the tube. The magnesium alloy tube is comparatively light, and the segmented and wrapped or jacketed tube has an increased capacity to absorb compressive forces. The tubes are useful as components of automotive vehicles.Type: ApplicationFiled: April 23, 2012Publication date: October 24, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Hamid G. Kia, Aihua A. Luo, John N. Owens, James F. Quinn
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Patent number: 8361251Abstract: A magnesium alloy comprising up to about six weight percent zinc and up to about one weight percent cerium may be hot worked to produce an intermediate or final alloy workpiece that exhibits enhanced ductility and strength at room temperature. The addition of zinc and a small amount of cerium may affect the magnesium alloy by increasing strength and ductility, and improving the work hardening behavior.Type: GrantFiled: October 20, 2008Date of Patent: January 29, 2013Assignee: GM Global Technology Operations LLCInventors: Aihua A. Luo, Raja K Mishra, Anil K. Sachdev
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Publication number: 20120301734Abstract: A method of bonding a metal to a substrate involves forming an oxide layer on a surface of the substrate, and in a molten state, over-casting the metal on the substrate surface. The over-casting drives a reaction at an interface between the over-cast metal and the oxide layer to form another oxide. The other oxide binds the metal to the substrate surface upon solidification of the over-cast metal.Type: ApplicationFiled: December 2, 2011Publication date: November 29, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Michael J. Walker, Anil K. Sachdev, Bob R. Powell, JR., Aihua A. Luo
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Publication number: 20120301669Abstract: A method of bonding a metal to a substrate involves forming a plurality of nano-features in a surface of the substrate, where each nano-feature is chosen from a nano-pore and/or a nano-crevice. In a molten state, the metal is over-cast onto the substrate surface, and penetrates the nano-features. Upon cooling, the metal is solidified inside the nano-features, where the solidification of the metal forms a mechanical interlock between the over-cast metal and the substrate.Type: ApplicationFiled: December 2, 2011Publication date: November 29, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Michael J. Walker, Bob R. Powell, JR., Aihua A. Luo
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Patent number: 8231936Abstract: Methods of reducing corrosion between magnesium and another metal are disclosed herein. In one method, a corrosion protection material is cold sprayed at an interface formed between the magnesium and the other metal, the corrosion protection material including magnesium. In another method, a cladding layer is applied to heat affected areas of the magnesium and/or the other metal, at a welded joint, or combinations thereof.Type: GrantFiled: December 10, 2008Date of Patent: July 31, 2012Assignee: GM Global Technology Operations LLCInventors: Guangling Song, Aihua A. Luo, Xiaohong Q. Gayden
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Publication number: 20120068497Abstract: Magnesium alloy tube members have the potential to reduce weight in automotive vehicle body structures and other applications but they tend to fragment and fail under compressive stress loads applied end-to-end along the longitudinal axis of the tube. It is found that, when the outside surface of the tube is tightly wrapped with fibers (for example, glass fibers or other suitable fibers) and, optionally, resin bonded to the tube surface, the capacity of the magnesium alloy tube to withstand and absorb compressive loads is greatly increased.Type: ApplicationFiled: September 21, 2010Publication date: March 22, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Hamid G. Kia, Aihua A. Luo, John N. Owens, James F. Quinn
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Publication number: 20110286880Abstract: One exemplary embodiment includes a cast alloy including Al present in an amount of about 6.5 wt % to about 9.0 wt %; Sn present in an amount of about 1.0 wt % to about 3.0 wt %; Ce present in an amount of about 0 wt % to about 1.0 wt %; and, Mg comprising a balance of the alloy minus an amount of minor and trace elements wherein Mg is present at an amount of greater than about 85 wt %.Type: ApplicationFiled: July 29, 2011Publication date: November 24, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Aihua A. Luo, Anil K. Sachdev
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Patent number: 8052224Abstract: One embodiment includes a wheel including a first portion including magnesium, the first portion including at least a rim; a second portion including aluminum; and an interface where the first portion and the second portion contact each other.Type: GrantFiled: November 10, 2008Date of Patent: November 8, 2011Assignee: GM Global Technology Operations LLCInventors: Aihua A. Luo, Anil K. Sachdev