Chongqing University

Jingfeng Wang

FuSheng Pan

Shijie Liu

Kui Wang

Shiqing Gao

Xing Peng

Jie Ren

Kai Ma

Chaoneng Dai

The present disclosure provides a high-plasticity rapidly-degradable Mg—Li—Gd—Ni alloy, including the following chemical elements by mass percentage: 1.0-10.0% of Gd, 0.2-2.0% of Ni, 5.5-10% of Li, and the rest of Mg and inevitable impurities. The impurities have a total content less than or equal to 0.3%. The present disclosure further provides a preparation method of the high-plasticity rapidly-degradable Mg—Li—Gd—Ni alloy. The high-plasticity rapidly-degradable Mg—Li—Gd—Ni alloy provided by the present disclosure constructs an α-Mg+β-Li dual-phase matrix structure by introducing β-Li with a body-centered cubic (BCC) structure with relatively more slip systems to improve plasticity of the alloy, then adds a certain amount of Gd element to weaken texture and promote non-basal plane slip, and further improves plasticity. In addition, by introducing the high-potential Ni-containing LPSO phase, a large potential difference with α-Mg and β-Li is formed to increase the degradation performance.

High-plasticity rapidly-degradable Mg-Li-Gd-Ni alloy and preparation method thereof

Provided are a high-strength magnesium alloy profile, a preparation process therefor and the use thereof, wherein same relate to the technical field of the formation of high-strength magnesium alloys. A strengthening phase of the high-strength magnesium alloy profile in an extrusion state mainly comprises LPSO phase and β phase, wherein the volume fraction of LPSO phase is 1-40%; and the volume fraction of β phase is 1-20%. A strengthening phase of the high-strength magnesium alloy profile in an aging state mainly comprises LPSO phase, β phase, β′ phase and γ′ phase, wherein the volume fraction of LPSO phase is 1-40%; the volume fraction of β phase is 1-20%; the number density of β′ phase is 10-10m, and the length to thickness ratio l/d thereof is 1:20; and the number density of γ′ phase is 10-10mand the length to thickness ratio l/d thereof is 1:50.

High-strength magnesium alloy profile, preparation process therefor and use thereof

Provided are a copper-containing, high-toughness and rapidly degradable magnesium alloy, a preparation method therefor and the use thereof, wherein same relate to the field of materials for oil and gas exploitation. When the magnesium alloy is in an as-cast state, an extrusion state or an aging state, a strengthening phase thereof mainly includes an MgCuRE-type long-period phase and an MgRE phase and an MgCu phase, the MgCuRE-type long-period phase has a volume fraction of 3-60%, the MgRE phase has a volume fraction of 0.5-20%, and the MgCu phase has a volume fraction of 0.5-15%, wherein RE is a rare-earth metal element.

Copper-containing, high-toughness and rapidly degradable magnesium alloy, preparation method therefor and use thereof

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Chongqing, China

Jingfeng Wang