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Investigation of ultrasonic indications in Ti alloy (Ti6Al4V) hot formed hemisphere

机译：钛合金（Ti6Al4V）热成型半球中的超声适应证研究

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摘要

Pressure vessels of titanium alloy (Ti6Al4V) are made through electron beam welding of hot formed hemispheres. During ultrasonic inspection of a batch of hot formed and machined hemispheres, ultrasonic indications beyond acceptable levels have been observed while inspecting as per AMS 2630B for class Al, whereas input material (hot rolled and annealed plate) has been qualified to the level of class Al. This paper presents the detailed investigation carried out to study the problem and to bring out the reasons behind the same. The authors attempted to correlate the microstructural features of this (alpha-beta) alloy in hot formed and annealed condition with the recorded ultrasonic indications.
机译：钛合金（Ti6Al4V）的压力容器通过热成型半球的电子束焊接制成。在对一批热成型和机加工的半球进行超声检查时，按照AMS 2630B对Al类进行检查时，发现超声指示超出可接受的水平，而输入材料（热轧和退火板）已达到Al类的水平。本文介绍了进行详细调查以研究该问题并阐明其背后的原因。作者试图将这种（α-β）合金在热成型和退火条件下的微观结构特征与记录的超声迹象相关联。

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