Journal of Failure Analysis and Prevention

, Volume 6, Issue 4, pp 97–105 | Cite as

A Workability Criterion for the Transformed Adiabatic Shear Band Phenomena during Cold Heading of 1038 Steel

  • A. Sabih
  • AM. Elwazri
  • J.A. Nemes
  • S. Yue


A criterion for predicting the workability limits for internal britde failure was developed for cold heading of 1038 steel. The criterion considers internal defects caused by microstructural changes generated by adiabatic shear. This transformation is termed the transformed adiabatic shear band (TASB) phenomena. The defect that develops is the formation ofbritde martensite as a result ofthe temperature rise and fall inside the adiabatic shear band (ASB). In this work, the material is considered to have a TASB defect when the temperature inside the ASB exceeds the phase transformation temperature (AC3). The empirical formulas provided by Andrews[1] were used to determine transformation temperatures. Microhardness testing and etching with 2% Nital and Le Pera etchants were performed on the sectioned specimens to locate and study the TASB. In order to simulate the cold heading process, a drop weight compression test was used and modeled with finite-element analysis (implemented within ABAQUS/Explicit).


Martensite Finite Element Simulation Equivalent Plastic Strain Void Nucleation Thermal Softening 


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Copyright information

© ASM International 2006

Authors and Affiliations

  • A. Sabih
    • 1
  • AM. Elwazri
    • 2
  • J.A. Nemes
    • 1
  • S. Yue
    • 2
  1. 1.Department of Mechanical Engineering, McGill Institute for Advanced MaterialsMcGill University, MontrealQuebecCanada
  2. 2.Department of Metals and Materials EngineeringMcGill UniversityMontreal, QuebecCanada

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