Influences of the Fe addition in various concentrations on the near–eutectoid Ti–4Au alloys were systematically investigated in this study in consideration of the great number of requirements for the biomedical materials. The Ti–4Au–xFe (x = 1, 3, 4, 5, 6, and 7 at.%) alloys were synthesized by physical metallurgy and their microstructures, crystal structures, lattice parameters, phases, and mechanical properties were analyzed. In addition, the investigations for the shape memory effect (SME) and superelasticity (SE) were also conducted to examine their performances of functionality. The β–phase was stabilized at room temperature by the 3 at.% addition of Fe into the binary Ti–4Au alloy. The specimen with optimized mechanical properties by trading–off its strength and ductility was found in the Ti–4Au–4Fe alloy. SME was revealed clearly in the Ti–4Au–3Fe alloy and slightly in the Ti–4Au–4Fe alloy; while SE was observed in the Ti–4Au–4Fe alloy. It was observed that there was a growing trend of the Ti₃Au precipitate amount with the raised concentration of Fe addition. The precipitates of the Ti₃Au were fine–tuned by the Fe addition for tailoring the various mechanical properties of the ternary Ti–4Au–xFe alloys, and the balanced performance was achieved by the 4 at.% Fe addition.

考虑到对生物医学材料的大量需求，本研究系统地研究了不同浓度的铁添加对近共析Ti-4Au合金的影响。Ti–4Au– x Fe（x 通过物理冶金合成了= 1、3、4、5、6和7 at。％的合金，并对它们的微观结构，晶体结构，晶格参数，相和力学性能进行了分析。此外，还对形状记忆效应（SME）和超弹性（SE）进行了研究，以检查它们的功能性能。通过在二元Ti-4Au合金中添加3 at。％的铁，可以使β-相在室温下稳定。在Ti–4Au–4Fe合金中发现了通过权衡强度和延展性而具有最佳机械性能的标本。SME在Ti–4Au–3Fe合金中清晰地显示出来，而在Ti–4Au–4Fe合金中则略有显示。而在Ti–4Au–4Fe合金中观察到SE。观察到Ti ₃有增长的趋势随着Fe添加浓度的增加，Au析出量增加。通过添加Fe来微调Ti ₃ Au的析出物，以适应三元Ti–4Au– x Fe合金的各种机械性能，并通过添加4 at。％的Fe达到平衡的性能。