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2627273 
Journal Article 
Microstructure and High Temperature Oxidation Performance of Silicide Coating on Nb-Based Alloy C-103 
Alam, MdZ; Rao, AS; Das, DK 
2010 
1 
Oxidation of Metals
ISSN: 0030-770X
EISSN: 1573-4889 
73 
5-6 
513-530 
WOS:000277146800003 
The microstructure evolution and tensile properties of ZK60 magnesium alloy after equal channel angular pressing (ECAP) have been investigated. The results show that the two-step ECAP process is more effective in grain refinement than the single-step ECAP process due to the lower deformation temperature, a mean grain size of similar to 0.8 mu m was obtained after two-step ECAP process at 513 K for four passes and 453 K for four passes. The EBSD examination reveals that ZK60 alloy after two-step ECAP process exhibits a more homogeneous grain size and misorientation distribution than single-step ECAP process. Both alloys after ECAP process present similar strong {0002} texture. The tensile strength of two-step ECAP alloy has also been improved compared with the single-step ECAP alloy. The strengthening effect was mainly ascribed to grain refinement. 
Silicide; Oxidation; Coatings; Niobium alloy