在油气生产中，可降解压裂材料可提高油气资源生产效率。对于快速降解的压裂材料，在保持高降解速率的同时，还要求具有较好的力学性能。本工作在前期获得具有高腐蚀速率的Mg-8Li-4Gd-1.5Ni铸态合金的基础上，对合金进行热轧加工，通过调控变形组织进一步提升合金的力学性能和腐蚀速率。结果表明，在轧制过程中，合金中的网状长周期堆垛有序结构相(LPSO相)逐渐转变为平行的纤维状，变形量达90%时LPSO相会形成较短的纤维状。合金在热轧过程中出现再结晶组织，GdNi₃颗粒细化。变形量70%时合金抗拉强度最高，达217 MPa，延伸率为17%。在3%KCl溶液中，变形量为90%时合金在25及93 ℃时均有最高的腐蚀速率，失重速率分别为0.47及3.63 mg/(cm²·min)，25 ℃时腐蚀电流密度最高，为5.34 mA/cm²。平行分布的LPSO相对合金的腐蚀有阻碍作用，但是LPSO相的弯曲、第二相的破碎、再结晶和位错密度的增加使合金内部的化学活性增强，导致腐蚀速率逐渐增高。热轧使合金中位错密度增加，晶粒尺寸减小，并发生再结晶，这些组织演变导致合金发生加工硬化和细晶强化，使得合金力学性能提升。

Oil and gas resources have become strategic assets, highlighting the need to improve production efficiency. Segmented fracturing technology effectively addresses the challenge of low fracturing efficiency and is widely used in oil and gas extraction. Therefore, the demand for degradable fracturing materials has increased rapidly to enhance oil and gas production efficiency. Rapidly degradable fracturing materials must achieve high degradation rates, while maintaining strong mechanical properties to ensure effective petroleum fracturing operations. Building on previous research on as-cast Mg-8Li-4Gd-1.5Ni alloys that are known for their high corrosion rates, this study performed hot rolling at 250 ^oC, with deformations of 30%, 50%, 70%, and 90%. Further, SEM, TEM, tensile mechanical performance testing, electrochemical testing, and hydrogen evolution measurements were used to examine the microstructure, mechanical properties, and corrosion behavior of the alloys. Results indicated that the microstructure underwent continuous elongation during rolling, and the networked long-period stacking ordered (LPSO) phases gradually transformed into parallel fibrous structures. At a deformation of 90%, the elongated fibrous LPSO phases were fractured into shorter segments, accompanied by an increase in the size and number of gaps between the LPSO phases. Recrystallized structures developed during hot rolling, accompanied by the refinement of GdNi₃ particles and an increase in the dislocation density. As the deformation increased, the tensile strength of the alloy initially increased and then decreased. The alloy exhibited the highest tensile strength of 217 MPa and an elongation of 17% at a deformation of 70%. In a 3%KCl solution, the mass loss rate, hydrogen evolution volume, and hydrogen evolution rate of the alloy increased steadily, as the deformation increased. At a deformation of 90%, the alloy exhibited the highest corrosion rates at 25 and 93 ^oC, with mass loss rates of 0.47 and 3.63 mg/(cm²·min), respectively. Compared with the as-cast alloy, the weight loss rate of the hot-rolled alloy at 25 ^oC increased by 30.55%, whereas at 93 ^oC, it was 7.72 times greater than at 25 ^oC. The corrosion current density reached a maximum of 5.34 mA/cm² at 25 ^oC. The corrosion began with pitting and gradually transitioned to filiform corrosion. The corrosion extended along the rolling direction at higher deformations. The parallel distribution of LPSO phases inhibited alloy corrosion. However, at a deformation of 90%, the fracture of the LPSO phases increased the number of galvanic corrosion sites. This fracture and the larger gaps between the LPSO phases reduced the protective effect. In addition, the bending of the LPSO phases, fragmentation of the secondary phases, recrystallization, and increased dislocation density enhanced the chemical reactivity of the alloy, resulting in a gradual increase in the corrosion rate. Hot rolling increased the dislocation density, reduced the grain size, and induced recrystallization in the alloy. These microstructural modifications resulted in work hardening and grain refinement, thereby improving the mechanical properties of the alloy.