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中文摘要：
通过成分微调在Ti-6Al-4V合金基础上发展了一种基于Ti—Al—V-Si四元系TC4S两相钛合金。研究表明，添加少量合金元素Si，并对Al，V元素含量进行微调，使新合金的主要力学性能得到提高，强度、塑性和断裂韧性得到良好匹配，从而满足了设计要求。TC4S合金可以在不明显降低塑性和韧性的前提下，比Ti-6Al-4VELI合金的强度提高80MPa-100MPa。
英文摘要：
A new alloy belonging to Ti-AI-V-Si system has been developed on the base of Ti-6Al-4V, designated as TC4S. Experimental test results show that mechanical properties of TC4S have been improved evidently by proper adjusting the contents of Al and V, adding small amount of Si when compared with conventional Ti-6Al-4V alloy. The satisfied match among the strength, the ductility and the fracture toughness of the alloy has been reached, and meets the requirements of the design. The strength of TC4S alloy can be increased by 60 MPa-100 MPa on the condition of the slight damaging its plasticity and toughness, compared with Ti-6Al-4V ELI.
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