Effect of Rolling Parameters on the Properties of Al-Fe-V Sheet Rolled on an Experimental Mill
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Effect of Rolling Parameters on the Properties of Al-Fe-V Sheet Rolled on an Experimental Mill A. Brown and D. Raybould Metals and Ceramic Lab Allied Corporation P.O. Box 1021R Morristown, New Jersey 07960
ABSTRACT In recent years, interest in high temperature aluminum alloys has increased. However, nearly all the data available is for simple extrusions. This paper looks at the properties of sheet made from a rapidly solidified The sheet is made by direct forging followed by hot AI-lOFe-2.5V-2Si alloy. rolling, this is readily scalable, so allowing the production of large sheet. The room temperature strength and fracture toughness of the sheet The high temperature strength, specific are comparable to those of 2014-T6. Recently, improved therstiffness and corrosion resistance are excellent. momechanical processing and new alloys have allowed higher strengths and fracture toughness values to be obtained.
INTRODUCTION Several developments have increased the interest of aerospace designers For in both light weight, high temperature and high stiffness materials. high strength structural applications, titanium and aluminum alloys are Improvements are being made to both of often the only materials available. these [11; however, it is the advanced aluminum alloys which have shown the In particular, rapidly improvement in properties 12). most significant solidified Al-Fe type alloys with good high temperature strengths have been The potential of these alloys was shown in the early 70's by reported. More recently, using workers at Tube Investment/British Aluminum 13] 14]. the Al-Fe system as a base, improved alloys with additions such as Ce,Mo,V, Vanadium has one of and Zr have been made by several organizations [5] [6]. the lowest diffusivities in aluminum and Al-Fe-V alloys have been shown to have excellent high temperature properties [2] [7]. Until now the designers have not had available data for complex shapes or for sheet; the latter is one of the most important potential applications This paper will deal with the initial work on for these types of materials. The work is experimental the production of sheet from Al-Fe-V type alloys. and, therefore, deals with relatively small sheet, but the design techniques Techniques like extrusion followed by rolling were used can be scaled-up. not used; instead, direct powder rolling type techniques were employed, even though these are known to be difficult and can result in some loss in mechaIn fact, as experience was gained, properties equal or nical properties. superior to those of extrusion were obtained.
EXPERIMENTAL Properties of An Al-lOFe-2.5V-2Si (452-S) was used for this program. The alloy was jet similar extruded alloys have been previously reported [7]. This cast to a thin ribbon with a predominantly zone 'A' microstructure.
Mat. Res. Soc. Symp. Proc. Vol. 5.
1986 Materials Research Society
286
may be described as a microeututic which is unresolvable by optical microscopy. Some zone 'B' microstructure was also present; although this was resolvable by optical mic
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