Near-Net-Shaping Hot Isostatic Pressing of Complicated Titanium Alloy Air Inlet

被引：0
|
作者：
Zhang H.-Y. [1 ]
Shi J.-L. [1 ]
Zhang X.-H. [1 ]
Yin Z.-W. [1 ]
Deng T.-Q. [1 ]
Xu X.-Z. [1 ]
机构：
[1] Aerospace Research Institute of Materials and Processing Technology, Beijing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2022年 / 43卷 / 08期
关键词：
Air inlet; Forming techniques; Hot isostatic pressing; Mechanical performance; Ramjet engine; Thin-walled structures; Titanium alloy;
D O I：
10.13675/j.cnki.tjjs.200967
中图分类号：
学科分类号：
摘要：
The air inlet of the ramjet is a complex shaped thin-walled titanium alloy component，which is very difficult to form. Using TA15 titanium alloy powder as the raw material，the air inlet was successfully developed for the first time in China by using near-net-shaping hot isostatic pressing technology. The overall structure was formed once，and the flight test was successfully passed. Samples were taken from the inlet body and microstructure at different locations were observed. The results show that the microstructure of TA15 titanium alloy is uniform at different positions，mainly lath-like or lamellar α-phase. Equivalent α-phase is distributed around the large strain zone of powder grain boundary，and a small amount of β is distributed between phases. The various properties of the material were tested. The average room temperature tensile strength，yield strength，elongation，reduction of area，500℃ tensile strength，fracture toughness and impact toughness were 995MPa，924MPa，18.2%，43%，673MPa，90.6MPa·m1/2 and 51.4J/cm2. All performance data have reached the level of the TA15 titanium alloy forgings standard，which show excellent comprehensive performance. © 2022 Journal of Propulsion Technology. All rights reserved.
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