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Microstructure and Properties of Dissoluble LA141-0.5Cu Magnesium Alloy Wires Applied to Oil and Gas Resource Exploitation.

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Název: Microstructure and Properties of Dissoluble LA141-0.5Cu Magnesium Alloy Wires Applied to Oil and Gas Resource Exploitation.
Autoři: Sun, Qiang, Xue, Jianjun, Shi, Yang, Weng, Dingwei, Zhang, Shaolin, Wei, Ran, Tong, Zheng, Qian, Jie
Zdroj: Metals (2075-4701); Aug2025, Vol. 15 Issue 8, p860, 12p
Témata: MAGNESIUM alloys, TENSILE strength, MATERIAL plasticity, DISSOLUTION (Chemistry), MECHANICAL behavior of materials, PETROLEUM industry, ANNEALING of metals
Abstrakt: Mg-Li-based dissoluble metal is a promising material for preparing dissoluble magnesium alloy wires. However, there are few reports on the development of Mg-Li dissoluble magnesium alloy wires so far. In this paper, the mechanical properties and dissoluble properties of as-drawn and annealed LA141-0.5Cu wires were investigated in detail. It was found that the tensile strength of the LA141-0.5Cu wires decreased from 160 MPa to 127 MPa and the elongation increased from 17% to 22% after annealing. The difference in corrosion rates (93 °C/3% KCl solution) between the as-drawn wires and annealed wires is not significant, with values of 5.1 mg·cm−2·h−1 and 4.5 mg·cm−2·h−1, respectively. This can be explained as follows: after annealing, the number of dislocations in the wire decreases, the strength decreases, and the plasticity increases. The reason why the wires have a significant corrosion rate is that there is a large potential difference between the Cu-containing second phase and the magnesium matrix, which forms galvanic corrosion. The decrease in dislocation density after annealing leads to a slight reduction in the corrosion rate of the wires. This work provides a qualified material for fabricating temporary blocking knots for the exploitation of unconventional oil and gas resources. [ABSTRACT FROM AUTHOR]
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Databáze: Complementary Index
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Abstrakt:Mg-Li-based dissoluble metal is a promising material for preparing dissoluble magnesium alloy wires. However, there are few reports on the development of Mg-Li dissoluble magnesium alloy wires so far. In this paper, the mechanical properties and dissoluble properties of as-drawn and annealed LA141-0.5Cu wires were investigated in detail. It was found that the tensile strength of the LA141-0.5Cu wires decreased from 160 MPa to 127 MPa and the elongation increased from 17% to 22% after annealing. The difference in corrosion rates (93 °C/3% KCl solution) between the as-drawn wires and annealed wires is not significant, with values of 5.1 mg·cm<sup>−2</sup>·h<sup>−1</sup> and 4.5 mg·cm<sup>−2</sup>·h<sup>−1</sup>, respectively. This can be explained as follows: after annealing, the number of dislocations in the wire decreases, the strength decreases, and the plasticity increases. The reason why the wires have a significant corrosion rate is that there is a large potential difference between the Cu-containing second phase and the magnesium matrix, which forms galvanic corrosion. The decrease in dislocation density after annealing leads to a slight reduction in the corrosion rate of the wires. This work provides a qualified material for fabricating temporary blocking knots for the exploitation of unconventional oil and gas resources. [ABSTRACT FROM AUTHOR]
ISSN:20754701
DOI:10.3390/met15080860