Studies on Ti6Al4V Components Produced by Semi-solid Forming Technology
Studies on Ti6Al4V Components Produced by Semi-solid Forming Technology
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DOI：
10.1016/j.matpr.2015.05.023
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
C. Seyboldt;M. Liewald;K. Riedmüller
中科院分区：
文献类型：
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作者：
C. Seyboldt;M. Liewald;K. Riedmüller
斯图加特大学金属成形技术研究所（IFU）目前的研究活动集中在半固态高熔点金属材料的加工上。该成形过程在固液线之间的范围内进行，因此使用半固体状态下的低材料粘度来实现复杂的零件几何形状。这项研究工作涉及钛或钴合金系统，这些系统广泛应用于医疗和航空航天技术。特别是钛合金ti6al4v，具有高强度、低密度和优异的耐腐蚀性，完全符合当今的轻量化要求，因此在未来的应用中将具有更大的重要性。由于这种良好的组合性能，这种合金现在被广泛应用于技术专业领域，尽管它的价格很高。因此，许多机械和热高应力的轻质部件，如涡轮叶片，都是用这种特殊的钛合金设计和制造的。用于此类材料系统的传统工艺，如铸造或锻造方法，通常在加热坯料时消耗大量能量，并且需要增加材料使用量，从而导致高生产成本。在这种情况下，这种半固态材料的加工在生产具有良好机械性能的复杂净形或近净形部件方面具有很大的潜力。
Current research activities at the Institute for Metal Forming Technology (IFU) of the University of Stuttgart are focusing on processing high-melting metal materials in the semi-solid state. This forming process is performed in the range between solidus and liquidus line and uses therefore the low materials viscosity in its semi-solid state for realizing complex part geometries. The research work deals with alloy systems based on titanium or cobalt which are widely used in both medical and aerospace technology. In particular, the titanium alloy Ti6Al4 V, possessing high strength, low density and excellent corrosion resistance exactly matches today's lightweight aspirations, and therefore will be of greater importance in the future applications. Due to this favorable combination of properties this alloy nowadays is widely used in technical specialty areas despite its high price. Therefore, many mechanically and thermally highly stressed lightweight components such as turbine blades are designed and manufactured out of this particular titanium alloy. Conventional processes used for such material systems like casting or forging methods usually consume a lot of energy when heating the billet and require increased materials usage, which results in high production-costs. In this context the processing of such materials in the semi-solid state has a great potential in terms of producing complex net-shape or near-net-shape components with good mechanical properties.