Disordering of FeAl by Mechanical Milling

Preparation of Ti-Al and Fe-Al Alloys by Mechanical Alloying

“…It shows that the B2 ordered phase was converted to disordered FeAl solid solution with A2 structure. This phenomenon has been already described in literature, but after much longer pro-cess duration [16]. The milling duration of 8 h resulted in homogeneous structure (Fig.…”

Disordering and reordering of mechanically milled superlattice alloys

“…A1Ru, which has the same simple superlattice as NiA1, is fairly strongly ordered and can accordingly be only partly disordered by milling (Hellstern et al 1989; Bakker et al 1995); the same applies to CuTi (Seki and Johnson 1990). Two recent studies of the milling of A1Fe (again, fairly strongly ordered) have both found that only partial disordering is possible here, down to an S value of 0-25--0.3 (Peng and Collins 1997;Clavaguera-Mora et al 1997). In all these cases, a balance is reached between mechanical disordering and simultaneous thermal reordering.…”

Metastable and transient states of chemical ordering in Fe-V nanocrystalline alloys

“…This could be caused by a smaller amount of chemical short-range order ͑SRO͒ in the ball-milled material. The large lattice parameters in alloys disordered by milling have generally been attributed to the formation of antisite defects as proposed for B2 FeAl, [19][20][21][22]41 but a high density of APB's could have a similar effect. A lattice expansion from interstitial atoms introduced from adsorption on the surfaces of the initial powders cannot be ruled out entirely.…”