Abstract The mechanical properties and wear performance of a dissolvable magnesium alloy used for manufacturing the temporary downhole fracturing parts were reported in this study. The dissolvable magnesium alloy's wear performance was compared with that of a commercially available 7075 aluminum alloy in dry sliding condition. The wear tests were performed on a universal tribometer at various normal loads ranging from 20 N to 60 N with a sliding velocity of 10 mm/s to simulate the wear between the fracturing tool and the ceramic proppant (Al2O3 particles). Mechanical testing showed that the ultimate tensile strength and compressive strength of the dissolvable magnesium alloy was 275.5 MPa and 482.7 MPa. The wear testing indicated that the dissolvable magnesium alloy exhibited lower friction coefficients, whereas larger wear rates than that of the 7075 aluminum alloy. The worn surface analysis of the tested magnesium alloy revealed that abrasive wear was the dominant wear mechanism, and oxidative wear was observed with the normal load further increased. The obtained results would provide further insights into the dissolvable magnesium alloy and guide the design of temporary structures or parts in certain applications.

中文翻译：

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多级压裂用可溶性镁合金力学性能及磨损行为

摘要 本文报道了一种用于制造临时井下压裂件的可溶性镁合金的力学性能和磨损性能。将可溶性镁合金的磨损性能与市售的 7075 铝合金在干滑动条件下的磨损性能进行了比较。磨损试验在通用摩擦计上进行，法向载荷范围为 20 N 到 60 N，滑动速度为 10 mm/s，以模拟压裂工具和陶瓷支撑剂（Al2O3 颗粒）之间的磨损。力学测试表明，可溶性镁合金的极限抗拉强度和抗压强度分别为275.5 MPa和482.7 MPa。磨损试验表明可溶性镁合金具有较低的摩擦系数，而磨损率比 7075 铝合金大。受试镁合金的磨损表面分析表明，磨粒磨损是主要的磨损机制，随着正常载荷的进一步增加，观察到氧化磨损。获得的结果将提供对可溶性镁合金的进一步了解，并指导某些应用中临时结构或部件的设计。