Preparation method for large-dimension light magnesium-aluminum based amorphous alloy

Abstract

The invention belongs to the field of amorphous alloys, and particularly relates to a preparation method for a large-dimension light magnesium-aluminum based amorphous alloy. The preparation method comprises the following steps: weighing powered magnesium based amorphous alloy and aluminum based amorphous alloy according to a target alloy component proportion, and uniformly mixing the magnesium based amorphous alloy with the aluminum based amorphous alloy to obtain magnesium-aluminum based amorphous alloy mixed powder; enabling a super-cooling liquid phase zone of the magnesium based amorphousalloy to be superposed with a super-cooling liquid phase zone of the aluminum based amorphous alloy; and preparing magnesium-aluminum based amorphous alloy through a powder sintering process or a laser additive manufacturing technology. The preparation method utilizes aluminum based amorphous alloy as a toughening phase to improve room-temperature plasticity of the magnesium based amorphous alloyor utilizes magnesium based amorphous alloy as a reinforcing phase to improve strength of the aluminum based amorphous alloy; and large-dimension light high-strength magnesium-aluminum based amorphous alloy is prepared by the powder sintering process or the laser additive manufacturing technology, so that the technical problem that the prepared composite material is not high in performance as relatively great difference exists between a crystal second phase and an amorphous matrix internal structure, deformation mode difference is relatively great, and interface metallurgical bonding is difficult is solved.

Description

technical field [0001] The invention belongs to the field of amorphous alloys, and more specifically relates to a preparation method of a large-sized light-weight magnesium-aluminum-based amorphous alloy. Background technique [0002] New lightweight and high-strength materials are widely used in aerospace, automotive lightweight, national defense equipment, large sea-crossing bridges, high-rise buildings and other fields. Titanium, magnesium, and aluminum are commonly used lightweight structural materials because of their abundant reserves, low density, and good strength properties. The strength of magnesium-based and aluminum-based amorphous alloys is 3 to 5 times that of traditional magnesium alloys and aluminum alloys. At the same time, it has good corrosion resistance, wear resistance, and high-temperature thermoplastic formability. It is a very promising New lightweight high-strength structural material. However, the preparation of amorphous alloys requires a fast co...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for preparing a large-sized lightweight magnesium-aluminum-based amorphous alloy, which uses aluminum-based amorphous as a toughening phase to improve the room temperature plasticity of the magnesium-based amorphous alloy Or use magnesium-based amorphous as a reinforcing phase to improve the strength of aluminum-based amorphous, and use powder sintering technology or laser additive manufacturing technology to prepare large-size, lightweight, high-strength magnesium-aluminum-based amorphous alloys, thereby solving the problem of using crystals in the prior art. There is a large difference in the internal structure of the two-phase and the amorphous matrix, and the deformation mode is quite different. It is difficult to realize the interface metallurgical bonding, which leads to the technical problem that the performance of the prepared composite material is not high.

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