Superplastic behaviour of Inconel 718 sheet
Superplastic behaviour of Inconel 718 sheet
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DOI：
10.1179/026708300101507154
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发表时间：
2000-11
影响因子：
1.8
通讯作者：
Y. Huang;M. Strangwood;P. Blackwell
中科院分区：
文献类型：
--
作者：
Y. Huang;M. Strangwood;P. Blackwell
Inconel 718是一种广泛用于航空航天工业的镍基合金，在高温下在强度和抗疲劳性方面具有良好的服务能力。Inconel 718，以板的形式，具有使用类似于用于许多铝和钛基合金的气体压力成形技术成形的能力。已经进行了广泛的研究计划，以调查这种合金的高温成形性。这涉及单轴拉伸试验，以确定流动应力和应变速率敏感性等参数，和微观结构检查，以调查静态加热和随后的变形下的晶粒稳定性。材料的形成特征与用SEM技术测定的δ相固溶线温度相关联。最佳成形温度和应变速率进行了讨论。
Inconel 718 is a nickel based alloy used extensively in the aerospace industry, having good service capabilities, in terms of strength and fatigue resistance, at high temperatures. Inconel 718, in the form of sheet, has the capability of being shaped using gas pressure forming techniques similar to those used for a number of aluminium and titanium based alloys. An extensive research programme has been carried out to investigate the high temperature formability of this alloy. This has involved both uniaxial tensile testing to determine such parameters as flow stress and strain rate sensitivity, and microstructural examination to investigate grain stability under both static heating and following deformation. The forming characteristics of the material have been correlated with the δ phase solvus temperature determined using SEM techniques. Optimum forming temperatures and strain rates are discussed.