Methods 51 cases of large airway stenosis were treated with the self-expanding NiTi alloy stents through oral cavity (16cases) or nasal cavity (35 cases) under the guide of X-ray.
When we use the aluminium alloy pipe to make heat exchanger, we must use expanding.
用铝合金管材制作散热器须进行扩口加工，其间往往会因为管材端部出现裂口而报废。
3
Due to the isolating effect of the austenite the expanding of the crack would be hindered efficiently, so the thermal fatigue property of the alloy was largely increased.