The deformation behavior of the L1{sub 0} ordered FePd alloy
- Univ. of Pittsburgh, PA (United States). Dept. of Materials Science and Engineering
The ordered equiatomic L1{sub 0} alloys such as CuAu, CoPt, FePt and FePd undergo a cubic (disordered; fcc) {yields} tetragonal (ordered; L1{sub 0}) transformation upon cooling and generally develop a so-called polytwinned structure. This polysynthetically twinned or lamellar microstructure is shown developed in an equiatomic FePd alloy. The microstructure consists of an aggregate of twin lamellae conjugated along the {l_brace}110{r_brace} planes of the parent cubic phase. The so-called c-domains or transformation twins produce a modulated structure whereby the c-axis of the L1{sub 0} tetragonal phase changes by approximately 90{degree} across the twin interfaces. These microlaminated structures introduce a novel constraint on plastic flow and are expected to have a major influence on the plasticity and fracture behavior. The transfer of shear across the twin interfaces through successive twin lamellae is an interesting problem from both a continuum and mechanistic point of view.
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Pittsburgh Univ., PA (United States)
- OSTI ID:
- 460420
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 7 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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