Precipitation behavior of B2-like particles in Fe-Cu binary alloy

Huiping Ren and Weimin Mao1) Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China2) Department of Materials Science and Engineering, Baotou University of Iron and Steel Technology, Baotou 014010, Ch

摘 要：The precipitation behavior in Fe-Cu binary alloy was investigated under transmission electron microscope （TEM） during aging at 650℃ for the time range of 100 s to 300 h. In addition to the zones with higher copper content and e-Cu were observed, a metastable phase with B2-like structure was found in the early stage of the precipitation process, which is quite different from the equilibrium copper phase shown in the Fe-Cu binary phase diagram and has perfect coherent relationship to the a-Fe matrix. The appearance of B2-like structure is very important concerning the mechanism of aging strengthening effect and mechanical properties of corresponding engineering steels and alloys containing copper.

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