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首页> 外文会议>World Conference on Titanium v.3; 20030713-20030718; Hamburg; DE >Mechanical Properties of SP-700 Titanium Alloy at Room Temperature
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Mechanical Properties of SP-700 Titanium Alloy at Room Temperature

机译：SP-700钛合金在室温下的力学性能

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摘要

An α+β titanium alloy with a nominal chemical composition of Ti-4.5Al-3V-2Fe-2Mo has been approved in Aerospace Material Specifications; AMS 4899 covers its sheet and plate products, and AMS 4964 does the bar and billet products. In addition, the design data of its sheet and bar products in mill-annealed condition were published in MIL-Handbook-5, which includes the design allowables of metallic aerospace materials. This alloy was primarily developed for superplastic forming application, and was named SP-700 from its excellent superplasticity at 700℃ level, but other properties have also been improved such as heat-treatablity, fatigue properties and cold formability. In this paper, mechanical properties data of mill-annealed SP-700 products, which were filed for approval of AMS specification and MIL-HDBK-5, are reviewed from the viewpoint of the statistical analysis. They include static tensile strength, fatigue strength and fracture toughness at room temperature. Fatigue property, one of the biggest advantages of SP-700, is evaluated with respect to the notch effects and the surface roughness conditions. Cold formability is another advantage of SP-700, though conventional high strength α+β titanium alloys lack it, and its benefit is studied by cold bend capability.
机译：航空材料规格中已批准了标称化学成分为Ti-4.5Al-3V-2Fe-2Mo的α+β钛合金； AMS 4899涵盖其板材和板材产品，而AMS 4964则处理棒材和方坯产品。此外，其在轧制退火条件下的板材和棒材产品的设计数据已发布在MIL-Handbook-5中，其中包括金属航空航天材料的设计允许范围。这种合金最初是为超塑性成形应用而开发的，因其在700℃的水平具有优异的超塑性而被命名为SP-700，但其他性能也得到了改善，例如可热处理性，疲劳性和冷成形性。本文从统计分析的角度回顾了已提交AMS规范和MIL-HDBK-5批准的轧制退火SP-700产品的机械性能数据。它们包括室温下的静态拉伸强度，疲劳强度和断裂韧性。疲劳性能是SP-700的最大优点之一，可以评估缺口效应和表面粗糙度条件。冷成型性是SP-700的另一个优点，尽管常规的高强度α+β钛合金没有此优点，并且通过冷弯性能来研究其优点。

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