RELATIONSHIP BETWEEN ORDER DEGREE INTERCEPTED AND MECHANICAL PROPERTIES OF Fe3Al

Pang Laixue  Sun Kangning  Fan Runhua  Bi Jianqiang

(Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061)

Wang Zhongkui

(Shandong Agricultural Machinery Critical Department, Jinan 250061)

Abstract: The glide energy B2-type and DO3-type in Fe3Al are calculated based on the empirical electron theory of solids and molecules (EET); the results indicate that B2-structure exhibits good ductility properties and low strength at ambient temperatures. The long-range-order intermetallic Fe3Al is investigated by order degree intercepted (quenched) technique. The results of XRD and compression-resistance show that Fe3Al with an imperfectly ordered B2 structure after order degree intercepted has low strength and low stiff. The mechanical properties are improved.

Key words: Fe3Al  Order degree intercepted  Glide energy  Mechanical properties

CLC No: TG156

山东省自然科学基金资助项目(Q99F01). Received 20040217, received in revised form 20040726