In-situ Residual Stress Measurement of Tungsten or Carbon FiberReinforced Titanium Composite under High and Cryogenic Temperature

采用点焊方法制备了钨纤维增强钛复合材料(W/Ti复合材料)。通过高温原位X射线应力测量和低温原位中子应力测量，估算了W/Ti复合材料中的残余应力。结果表明，在W/Ti复合材料中，几乎所有的应力都是由热致应力引起的，这与钨纤维与钛基体之间的热膨胀失配有关。

Tungsten fiber reinforced titanium composite (W/Ti composite) wasmanufactured by the spot welding method. Residual stresses in the W/Ti composite was estimated by thehigh temperature in-situ x-ray stress measurement and the cryogenic temperature in-situ neutron stressmeasurement. It was confirmed that the almost generated stresses in the W/Ti composite are the thermalinduced stresses, and depend on the thermal expansion mismatch between the tungsten fiber and thetitanium matrix.