Composition design of reduced activation ferritic/martensitic (RAFM) steels based on cluster structure model

Yao Shi, Qing Wang, Qun Li, Chuang Dong

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The composition characteristics of reduced activation ferritic/martensitic (RAFM) steels were investigated using a cluster-plus-glue-atom model. The basic cluster formula [Cr-Fe14](Cr0.5Fe0.5) was determined, where the cluster part [Cr-Fe14] is a rhombic dodecahedron centered by Cr and surrounded by 14 Fe atoms. According to the principle related with self- consistent magnification of cluster formula and similar element substitution, two multi-component alloys were designed by adding V, Mn, Mo, W, Nb and C into [Cr-Fe14](Cr0.5Fe0.5) i.e.[Cr16Fe224](Cr8(V, Nb, Mn, Mo, W, Fe)8) and {[Cr16Fe224](Cr8(V, Nb, Mn, Mo, W, Fe)8)}C1. Alloy rods with a diameter of 6 mm were prepared by copper mould suction casting method, then normalized at 1323 K for 0.5 h and tempered at 1023 K for 1 h, both followed by water-quenching. The experimental results revealed that the substitutional solid solution alloys without C exhibit a monolithic ferrite microstructure and that of the other serial alloys with C varies with alloying elements and their contents. The microhardness (HV) of alloys changes with microstructures, and furthermore, while the HV of substitutional solid solution alloys decreases monotonously with the increase of the valence electron concentration per volume VEC/Ra3.

Original languageEnglish
Pages (from-to)594-600
Number of pages7
JournalCailiao Yanjiu Xuebao/Chinese Journal of Materials Research
Volume28
Issue number8
StatePublished - 25 Aug 2014
Externally publishedYes

Keywords

  • Cluster
  • Composition design
  • Fe-based alloys
  • Metallic materials
  • Reduced activation ferritic/martensitic steels
  • structure model

Fingerprint

Dive into the research topics of 'Composition design of reduced activation ferritic/martensitic (RAFM) steels based on cluster structure model'. Together they form a unique fingerprint.

Cite this