A graphene modifying method of metal having following steps of providing metal powders, graphene powders and a binder, the metal powder has metal particles, and the graphene powder has graphene micro pieces, each graphene micro piece is formed by graphene molecules connected with each other, each graphene molecule is connected to a stearic acid functional group by a sp3 bond; mixing the metal powder, the graphene powder and the binder to generate heat by a friction, each sp3 bond connected with the stearic acid functional group is thereby heated and broken, each graphene molecule is connected with other graphene molecules via the broken sp3 bond, and the metal particles are thereby wrapped by the graphene molecules; and sintering the metal particles into a metal body to transform the graphene molecules into a three-dimensional mash embedded in the metal body.

Provided in one embodiment is a method, comprising: sintering a plurality of nanocrystalline particulates to form a nanocrystalline alloy, wherein at least some of the nanocrystalline particulates may include a non-equilibrium phase comprising a first metal material and a second metal material, and the first metal material may be soluble in the second metal material. The sintered nanocrystalline alloy may comprise a bulk nanocrystalline alloy.

Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.

An additive manufacturing system is disclosed. The additive manufacturing system may include a moveable support, and a print head connected to the moveable support. The print head may be configured to discharge a continuous reinforcement that is wetted with a liquid matrix. The additive manufacturing system may also include an auto-threader configured to thread the continuous reinforcement through the print head, and a controller in communication with the moveable support, the print head, and the auto-threader. The controller may be configured to selectively activate the auto-threader at a start of a manufacturing process.

Provided herein are nanocrystalline materials comprising, e.g., a matrix including one or more metals; and nanostructures dispersed in the matrix, wherein the matrix is polycrystalline and includes grains having an average size of about 1μm or less. Also provided herein are manufacturing methods of a nanocrystalline materials.

Provided herein are nanocrystalline materials comprising, e.g., a matrix including one or more metals; and nanostructures dispersed in the matrix, wherein the matrix is polycrystalline and includes grains having an average size of about 1μm or less. Also provided herein are manufacturing methods of a nanocrystalline materials.

Methods of making metal bond abrasive articles via powder bed jetting are disclosed. Metal bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools.

Methods of making metal bond abrasive articles via powder bed jetting are disclosed. Metal bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools.

A cemented carbide including an eta phase and a Ni—Al binder is provided. The Ni—Al binder includes intermetallic y′-Ni.sub.3Al-precipitates embedded in a substitutional solid solution matrix of Al and Ni. A weight ratio Al/Ni of between 0.03 to 0.10, wherein a total amount of Ni and Al is between 70 to 95 wt % of the total binder A method of making a cutting tool is also provided.

A cemented carbide including an eta phase and a Ni—Al binder is provided. The Ni—Al binder includes intermetallic y′-Ni.sub.3Al-precipitates embedded in a substitutional solid solution matrix of Al and Ni. A weight ratio Al/Ni of between 0.03 to 0.10, wherein a total amount of Ni and Al is between 70 to 95 wt % of the total binder A method of making a cutting tool is also provided.