Harmonic structure, a promising microstructure design

Kei Ameyama, Fabien Cazes, Hervé Couque, Guy Dirras, Shoichi Kikuchi, Jia Li, Frédéric Mompiou, K. Mondal, Dmytro Orlov, Bhupendra Sharma, David Tingaud, Sanjay K. Vajpai

Research output: Contribution to journalArticlepeer-review


The harmonic structure is a recently introduced concept paving the way for engineering metallic materials to achieve excellent mechanical performance. They consist of soft coarse-grained regions (Core) that are three-dimensionally surrounded by a connected network of hard ultra-fine grained regions (Shell). The interaction in these Core–Shell regions produces a synergistic effect, during plastic deformation, leading to superior mechanical properties that are extremely important in practical applications. The current review paper is aimed at providing a critical assessment on this novel concept of microstructure design. It also involves the identification and critical discussion of key issues which deserve additional studies.

Original languageEnglish
Pages (from-to)440-471
Number of pages32
JournalMaterials Research Letters
Issue number7
Publication statusPublished - 2022

Subject classification (UKÄ)

  • Manufacturing, Surface and Joining Technology

Free keywords

  • Harmonic structure
  • mechanical properties
  • metallic materials
  • stress-train
  • synergy


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