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Strengthening of iron aluminide alloys for high-temperature applications

机译:高温应用中铝铁合金的强化

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摘要

An overview is given on materials developments of ferritic and Fe_3Al-based iron aluminium alloys with strengthening precipitate phases for high-temperature applications currently underway at the Max-Planck-Institut fur Eisenforschung GmbH (MPIE). The development of high-temperature alloys for structural applications is to be focussed on optimisation of strength, creep and corrosion resistance at high temperatures and sufficient ductility at lower temperatures. This is discussed with respect to recent studies on Fe-Al-based alloys with strengthening precipitates, such as K-phase Fe_3AlC_x, MC-carbides, Laves phase, and the B2-ordered intermetallic phase NiAl. The following alloy systems have been investigated: Fe-Al-X (X=C, Ti, Ta, Mo, Zr), Fe-Al-Ti-Nb, Fe-Al-Ni-Cr, and Fe-Al-M-C (M=Ti, V, Nb, Ta). The investigations have been focussed on the microstructure, constitution, mechanical properties, and high-temperature corrosion behaviour of Fe-Al-based alloys with Al contents ranging from 10 to 30 at. %.
机译:Max-Planck-Institut fur Eisenforschung GmbH(MPIE)目前正在对高温应用的铁素体和Fe_3Al基铁铝合金的材料发展进行概述。用于结构应用的高温合金的开发将集中在高温下强度,蠕变和耐腐蚀性的优化以及低温下足够的延展性的优化上。关于具有增强析出物的Fe-Al基合金的最新研究进行了讨论,例如K相Fe_3AlC_x,MC碳化物,Laves相和B2级金属间相NiAl。研究了以下合金体系:Fe-Al-X(X = C,Ti,Ta,Mo,Zr),Fe-Al-Ti-Nb,Fe-Al-Ni-Cr和Fe-Al-MC M = Ti,V,Nb,Ta)。研究集中在铝含量为10至30 at的Fe-Al基合金的显微组织,组成,力学性能和高温腐蚀行为上。 %。

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