Precipitation in ductile Fe–18Al–5Cr alloys with additions of Mo, W and C and effects on high-temperature strength

Creep of Fe–18Al–4Cr alloy with zirconium addition

“…Nevertheless, further improvement of creep resistance is unavoidable even in low aluminium, disordered A2 alloys. In this respect, recently published studies of alloys of this type strengthened by Zr-containing intermetallic precipitates [3][4][5] or by molybdenum and wolfram carbides [6] have been promising. In the present contribution, we would like to report results of creep experiments in a Fe-18Al-4Cr-type alloy strengthened by additions of zirconium and carbon in amounts exceeding those in the FAP alloy.…”

Recent Developments Toward the Application of Iron Aluminides in Fossil Fuel Technologies

“…Decomposition in FeNiAl‐base alloys,19, 20 for example to a β‐β′ phase mixture (disordered A2 with ordered B2), allowed good strength with balanced ductility, while suitable composition selection in FeTiAl alloys allowed coherent mixtures of B2‐L2 1 ‐DO 3 phases with expectations of good strength and ductility. Somewhat similar research has been conducted at CENIM, Spain, with an emphasis on obtaining fine phases, of high stability against coarsening when possible, by heat treatments for precipitation of intermetallic or carbide phases, such as Fe 2 NbAl Heusler, Fe 3 Zr, or Mo, W carbides 21–23. This study has also examined the decomposition of FeNiAl alloys, leading to a β′‐γ mixture with good strength at high temperature 24.…”

“…Somewhat similar research has been conducted at CENIM, Spain, with an emphasis on obtaining fine phases, of high stability against coarsening when possible, by heat treatments for precipitation of intermetallic or carbide phases, such as Fe 2 NbAl Heusler, Fe 3 Zr, or Mo, W carbides. [21][22][23] This study has also examined the decomposition of FeNiAl alloys, leading to a b 0 -g mixture with good strength at high temperature. [24] Figure 2 shows examples of fine intermetallic precipitates in some iron aluminide matrices, leading to good strength at temperatures around 700 8C.…”

Solidification and high-temperature phase equilibria in the Fe–Al-rich part of the Fe–Al–Nb system

“…[1][2][3][4][5]. One of the candidates frequently discussed as alloying addition is Nb [6][7][8][9][10].…”