气体捕捉法制备泡沫Ti-6Al-4V三明治结构与性能评价
发布时间：2018-08-04 17:01
【摘要】：基于气体捕捉法制备泡沫钛三明治结构工艺,对以钢包套+Ti-6Al-4V板+Ti-6Al-4V粉的封装工艺制备的泡沫Ti-6Al-4V三明治结构预制坯进行了900℃下不同变形量的轧制,并进行了950℃/10h的等温发泡。通过SEM对不同状态的三明治结构芯部孔洞状态进行观察和测量,探究了轧制变形量对泡沫Ti-6Al-4V三明治结构预制坯等温发泡行为的影响。结果表明:轧制主要是以沿轧制方向拉长孔洞和增加孔洞连通的方式影响泡沫Ti-6Al-4V三明治结构芯部,且轧制变形量越大越严重,但对孔洞内壁形态及孔洞在垂直于轧向平面内的形态未产生影响。当预制坯轧制变形量为80%时,经等温发泡成功制备了面板厚度为362μm,芯部孔隙率达到40%的泡沫Ti-6Al-4V三明治结构,其在高应变速率下抗压强度达到824.8 MPa,400℃下热导率仅为致密金属的52.8%。
[Abstract]:Based on the technology of preparing foam titanium sandwich structure by gas capture method, the prefabricated billet of foam Ti-6Al-4V sandwich structure prepared by Ti-6Al-4V powder encapsulation process of ladle Ti-6Al-4V plate was rolled at 900 鈩，
本文编号：2164525
[Abstract]:Based on the technology of preparing foam titanium sandwich structure by gas capture method, the prefabricated billet of foam Ti-6Al-4V sandwich structure prepared by Ti-6Al-4V powder encapsulation process of ladle Ti-6Al-4V plate was rolled at 900 鈩，
本文编号：2164525
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