ZE41 magnesium alloy has been processed by friction stir processing (FSP) with an aim to investigate the role of microstructure on the degradation behavior and mechanical response targeted for temporary orthopedic implant applications. Grain size reduction was achieved in the ZE41 Mg alloy from 107 ± 6.7 µm to 3.5 ± 1.5 µm after FSP. Increased hardness up to 30% was measured in the stir zone of FSPed sample. From the immersion studies done in simulated body fluids (SBFs) for 72 h, decreased weight loss was measured for the FSPed ZE41 compared with unprocessed alloy due to deposition of more Ca/P mineral phase. From the tensile tests, higher ultimate tensile strength was measured for FSPed ZE41 alloy compared with unprocessed alloy. Furthermore, the tensile specimens were exposed to corroding medium SBF for 72 h and then tensile tests were carried out. Result demonstrated the combined effect of grain refinement, decreased intermetallic phase and formation of supersaturated grains on sustaining the improved mechanical properties after degradation which demonstrated the promising role of modified microstructure by FSP on enhancing the strength of ZE41 Mg alloy in the presence of simulated physiological environment.

ZE41镁合金已通过摩擦搅拌工艺（FSP）进行了加工，目的是研究微观结构在临时骨科植入物应用中针对降解行为和机械响应的作用。FSP后，ZE41 Mg合金的晶粒尺寸从107±6.7 µm减小到3.5±1.5 µm。在FSPed样品的搅拌区中测得的硬度增加到30％。从在模拟体液（SBFs）中浸泡72小时的浸入研究可以看出，由于沉积了更多的Ca / P矿物相，与未加工的合金相比，FSPed ZE41的重量损失有所减少。根据拉伸试验，与未经加工的合金相比，FSPed ZE41合金测得的极限抗拉强度更高。此外，将拉伸试样暴露于腐蚀介质SBF中72 h，然后进行拉伸试验。结果表明晶粒细化，金属间相减少和过饱和晶粒形成对降解后维持改善的机械性能的综合作用，表明在模拟生理环境下，FSP改性的微观结构对增强ZE41 Mg合金强度具有有希望的作用。