Northwestern University

Massachusetts Institute of Technology

Ford Global Technolgoies, LLC

Boise State University

The Boeing Company

Nanoal LLC

Electrovac Gesmbh

David C Dunand

David N Seidman

James Maurice Boileau

Bita Ghaffari

Peter Mullner

Christopher Shane Huskamp

Yuttanant Boonyongmaneerat

Christopher Booth-Morrison

Peter Zwigl

Anthony De Luca

Markus Chmielus

Christopher Allan Schuh

Jiaxing Huang

Ramille N Shah

Adam E Jakus

Nhon Q Vo

Andreas Mortensen

Kevin T McVary

Hermann Holzer

Luke Clyde Oak Prestowitz

Cassie Witherspoon

Peiqi Zheng

Xuexi Zhang

Dinc Erdeniz

Brian V Le

Cynthia M Bedell

Amir Rezaei Farkoosh

Alberto Colombo

Fernando Reyes Tirado

Nikole J Kucza

James M Boileau

Methods of treating metal nanocrystals are provided. In embodiments, such a method comprises exposing metal nanocrystals comprising a metal and characterized by at least one twinning boundary therein, to a plating solution comprising a reducing agent and coating metal cations comprising a different metal, under conditions to form a coating of the different metal on surfaces of the metal nanocrystals via electroless deposition by chemical reduction of the coating metal cations, thereby providing coated metal nanocrystals. Methods of forming bulk nanostructured metal alloys from the coated metal nanocrystals are also provided.

Methods for treating metal nanocrystals and for forming bulk nanostructured metal alloys

A method of forming an aluminum alloy component including melting and solidifying an aluminum alloy, solution treating the aluminum alloy, and heat treating the aluminum alloy. The aluminum alloy includes scandium, zirconium, erbium, silicon, at least one of molybdenum and tungsten, manganese and the balance aluminum and incidental impurities. The concentration of the alloying elements, in atom %, is greater than 0.0 and less than or equal to 0.15 scandium, greater than 0.0 and less than or equal to 0.35 zirconium, greater than 0.0 and less than or equal to 0.15 erbium, greater than 0.0 and less than or equal to 0.2 silicon, greater than 0.0 and less or equal to 0.75 molybdenum when included, greater than 0.0 and less than or equal to 0.35 tungsten when included.

High temperature, creep-resistant aluminum alloy microalloyed with manganese, molybdenum and tungsten

A cobalt based superalloy and a method of producing the same. The superalloy includes a nominal composition comprising at least cobalt, aluminum, Z and vanadium, Z being at least one of tantalum and niobium, processed such that the superalloy comprises gamma and gamma-prime phases with stable gamma+gamma-prime microstructures.

Cobalt-based superalloys with stable gamma-prime precipitates, method of producing same

This invention discloses a series of low-cost, castable, weldable, brazeable and heat-treatable aluminum alloys based on modifications of aluminum-manganese-based alloys, which turn all the non-heat treatable Mn-containing aluminum alloys into heat treatable alloys with high-strength, ductility, thermal stability, and resistance to creep, coarsening and recrystallization. These alloys inherit the excellent corrosion resistance of the Al—Mn-based alloys and can be utilized in high temperature, high stress and a variety of other applications. The modifications are made through microalloying with one or any combinations of tin, indium, antimony and bismuth at an impurity level of less than 0.02 at. %, which creates nanoscale α-Al(Mn,TM)Si precipitates with a cubic structure (wherein TM is one or more of transition metals, and Mn is the main element) in an Al(f.c.c.)-matrix with a mean radius of about 25 nm and a relatively high volume fraction of about 2%.

Ultra-strong aluminum alloys for ambient and high-temperature applications

A high temperature creep-resistant aluminum alloy microalloyed with manganese and molybdenum and/or tungsten is provided. The aluminum alloy includes scandium, zirconium, erbium, silicon, at least one of molybdenum and tungsten, manganese and the balance aluminum and incidental impurities. The concentration of the alloying elements, in atom %, is greater than 0.0 and less than or equal to 0.15 scandium, greater than 0.0 and less than or equal to 0.35 zirconium, greater than 0.0 and less than or equal to 0.15 erbium, greater than 0.0 and less than or equal to 0.2 silicon, greater than 0.0 and less or equal to 0.75 molybdenum when included, greater than 0.0 and less than or equal to 0.35 tungsten when included, and greater than 0.0 and less than or equal to 1.5 manganese. And the total concentration of Zr+Er+Sc is greater than or equal to 0.1.

A system may include an actuation member having a first end and a second end. A length of the actuation member is greater than a width of the actuation member. The length extends from the first end to the second end along a longitudinal axis when the actuation member is undeformed. The actuation member may include a magnetic shape memory alloy. The system may further include an anchor retaining the first end of the actuation member. The second end of the actuation member may be free to move laterally to the longitudinal axis in response to a deformation of the actuation member. The system may also include a magnetic field source in proximity to the actuation member. The magnetic field source may be configurable to alter a magnetic field applied to the actuation member to adjust the extent of deformation of the actuation member.

Actuation via magnetic torque driven deformation

Certain aspects of the invention provides a transient liquid phase (TLP) bonding structure, including Ni based alloys and a TLP bonded layer formed by pack cementation on the Ni based alloys using a pack composition. In one embodiment, the pack composition includes 57 wt. % of aluminum oxide powder, 30 wt. % of Ti powder, 10 wt. % of Ni-50 wt. % Al alloy powder and 3 wt. % of ammonium chloride powder. The Ni based alloys may be Ni-20 wt. % Cr alloys. In certain embodiments, pack cementation is performed on the Ni based alloys under argon for an hour using the pack composition to form a coating. Then the structure is sonicated in acetone for 2 hours, and then annealed under vacuum at about 1200&#xb0; C. for 2 days to form the TLP bonding structure, which has a uniform &#x3b3;' phase distribution with identical compositions and properties at its bonding regions.

Transient liquid phase (TLP) bonding of nickel based alloys by forming an aluminum-titanium coating and subsequent heat treatment

An aluminum alloy including additions of scandium, zirconium, erbium and, optionally, silicon.

Aluminum alloy with additions of scandium, zirconium and erbium

Aluminum-zirconium and aluminum-zirconium-lanthanide superalloys are described that can be used in high temperature, high stress and a variety of other applications. The lanthanide is preferably holmium, erbium, thulium or ytterbium, most preferably erbium. Also, methods of making the aforementioned alloys are disclosed. The superalloys, which have commercially-suitable hardness at temperatures above about 220&#xb0; C., include nanoscale AlZr precipitates and optionally nanoscale AlEr precipitates and nanoscale Al(Zr,Er) precipitates that create a high-strength alloy capable of withstanding intense heat conditions. These nanoscale precipitates have a L1-structure in &#x3b1;-Al(f.c.c.) matrix, an average diameter of less than about 20 nanometers ('nm'), preferably less than about 10 nm, and more preferably about 4-6 nm and a high number density, which for example, is larger than about 10m, of the nanoscale precipitates. The formation of the high number density of nanoscale precipitates is thought to be due to the addition of inoculant, such as a Group 3A, 4A, and 5A metal or metalloid. Additionally, methods for increasing the diffusivity of Zr in Al are disclosed.

Aluminum superalloys for use in high temperature applications

Methods of forming three-dimensional metallic objects are provided. A metal oxide paste comprising metal oxide particles, a polymeric binder and an organic solvent is extruded through a tip to deposit sequential layers of the metal oxide paste on a substrate to form a three-dimensional metal oxide object. The three-dimensional metal oxide object is exposed to a reducing gas at a temperature and for a period of time sufficient to reduce and to sinter the metal oxide particles to form a three-dimensional metallic object. Depending upon the composition of the metal oxide paste, the three-dimensional metallic object may be composed of a single metal, a simple or complex metal-metal alloy, or a metal-ceramic composite.

Methods for fabricating three-dimensional metallic objects via additive manufacturing using metal oxide pastes

A penile prosthesis is disclosed that can alternate between an erect and flaccid state based on the shape memory properties of an exoskeleton that is responsive to increases and decreases in temperature. The exoskeleton consists of a shape memory alloy, such as nitinol, which in the erect configuration can radially expand and resist axial loads and buckling forces during coitus. The shape memory alloy is temperature-tuned to undergo a change to an erect state under external application of heat and can revert to a flaccid state with cooling below resting penile temperature.

Penile prosthesis

Magnetic materials and methods exhibit large magnetic-field-induced deformation/strain (MFIS) through the magnetic-field-induced motion of crystallographic interfaces. The preferred materials are porous, polycrystalline composite structures of nodes connected by struts wherein the struts may be monocrystalline or polycrystalline. The materials are preferably made from magnetic shape memory alloy, including polycrystalline Ni&#x2014;Mn&#x2014;Ga, formed into an open-pore foam, for example, by space-holder technique. Removal of constraints that interfere with MFIS has been accomplished by introducing pores with sizes similar to grains, resulting in MFIS values of 0.12% in polycrystalline Ni&#x2014;Mn&#x2014;Ga foams, close to the best commercial magnetostrictive materials. Further removal of constraints has been accomplished by introducing pores smaller than the grain size, dramatically increasing MFIS to 2.0-8.7%. These strains, which remain stable over &#x3e;200,000 cycles, are much larger than those of any polycrystalline, active material.

Polycrystalline foams exhibiting giant magnetic-field-induced deformation and methods of making and using same

A magnetic materials construct and a method to produce the construct are disclosed. The construct exhibits large magnetic-field-induced deformation through the magnetic-field-induced motion of crystallographic interfaces. The construct is a porous, polycrystalline composite structure of nodes connected by struts wherein the struts may be monocrystalline or polycrystalline. If the struts are polycrystalline, they have a 'bamboo' microstructure wherein the grain boundaries traverse the entire width of the strut. The material from which the construct is made is preferably a magnetic shape memory alloy, including polycrystalline Ni&#x2014;Mn&#x2014;Ga. The construct is preferably an open-pore foam. The foam is preferably produced with a space-holder technique. Space holders may be dissolvable ceramics and salts including NaAlO.

Magnetic material with large magnetic-field-induced deformation

Superconducting phases comprising magnesium diboride related composites and methods of preparation.

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Evanston, IL, United States of America

David C Dunand