THE ROLE OF ACTIVE ELEMENTS IN FE-CR-AL ALLOYS FOR HEATING ELEMENT APPLICATIONS

被引：9
作者：
SATYANARAYANA, DVV
PANDEY, MC
机构：
[1] Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad
来源：
BULLETIN OF MATERIALS SCIENCE | 1995年 / 18卷 / 03期
关键词：
FERRITIC STAINLESS STEEL; HEATING ELEMENT; ACTIVE ELEMENT; DUCTILE BRITTLE TRANSITION TEMPERATURE; GRAIN GROWTH; FRACTURE MODE;
D O I：
10.1007/BF02749658
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The role of active elements (zirconium, cerium and yttrium) in grain growth and its subsequent effect on room-temperature tensile fracture behaviour of Fe-Cr-Al alloys has been investigated. The alloys containing active elements exhibited improved resistance to grain growth. Yttrium-containing alloy retained higher room-temperature tensile ductility even after heating at higher temperatures because of its superior resistance to grain coarsening. All the alloys, with and without active elements, exhibited a sudden drop in room-temperature tensile ductility, with concommitant change in fracture mode from dimple rupture to cleavage, in a narrow band of 39-44 mu m grain size. The ductile-brittle transition temperatures (DBTT) of these alloys were found to be 150 degrees C and 215 degrees C fdr grain sizes 25 mu m and 100 mu m respectively. The accelerated life test showed-that the alloys containing active elements exhibited longer lives.
引用
收藏
页码：207 / 221
页数：15
相关论文
共 10 条
  • [1] Amano T., Yajima S., Saito Y., Proceedings JIMIS-3: High Temperature Corrosion, (1983)
  • [2] Amano T., Yajima S., Saito Y., Trans. JIM, 20, (1979)
  • [3] Beranger G., Armanet F., Lambertin M., Conf. Proc. on the role of active elements on the oxidation behaviour of high temperature metals and alloys, (1989)
  • [4] Cottrell A.H, Trans. Am. Inst. Min. (Metall). Engres, 212, (1958)
  • [5] Dubey R.K, Basak P., Chaudhury S.K, Tool & Alloy Steels, 16, (1982)
  • [6] Golightly F.A, Scott F.H, Wood G.C, Oxidation of Metals, 10, (1976)
  • [7] Keown S.R, Stainless Steel ’87, (1987)
  • [8] Ramanarayan T.A, Raghavan M., Petkovic-Luton R., J. Electrochem. Soc., 131, (1984)
  • [9] Tien J.K, Pettit F.S, Metall. Trans., 3, (1972)
  • [10] Zener C., Fracturing of metals, (1948)
1