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Science China Technological Sciences

, Volume 62, Issue 4, pp 546–550 | Cite as

Alter martensitic phase transformation kinetics by forming Ni-rich nanolayer in metastable austenitic steels

  • YiZhi Zhang
  • JiaBin Liu
  • HongTao WangEmail author
Article
  • 32 Downloads

Abstract

A 5 nm Ni-rich nanolayer has been introduced along nanoscale martensite/austenite phase boundaries (PBs) by one-step low-temperature annealing treatment of cold-rolled meta-stable austenitic steels. Control experiments reveal that the martensitic phase transformation kinetics can be significantly altered by presence of the nanolayers. The growth of pre-existed martensites is substantially suppressed while the martensite nucleation in austenites is less affected, as revealed by a statistical investigation on the martensite size distribution under different tensile strains. Enhanced strength and excellent ductility have been achieved simultaneously in the annealed samples, demonstrating that PBs can be effectively engineered to achieve optimized mechanical properties.

Keywords

phase boundary martensitic transformation segregation 

Supplementary material

11431_2018_9401_MOESM1_ESM.docx (25.1 mb)
Alter martensitic phase transformation kinetics by forming ni-rich nanolayer in metastable austenitic steels

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute of Applied MechanicsZhejiang UniversityHangzhouChina
  2. 2.College of Materials Science and EngineeringZhejiang UniversityHangzhouChina

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