Details

Title

Segregation Behaviour of Third Generation Advanced High-Strength Mn-Al Steels

Journal title

Archives of Foundry Engineering

Yearbook

2012

Numer

No 2

Publication authors

Keywords

Macrosegregation ; Microsegregation ; AHSS ; TRIP Steel ; EDS ; microstructure ; Hot Deformation ; Microalloying

Divisions of PAS

Nauki Techniczne

Description

Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.

Abstract

The paper addresses the macro- and microsegregation of alloying elements in the new-developed Mn-Al TRIP steels, which belong to the third generation of advanced high-strength steels (AHSS) used in the automotive industry. The segregation behaviour both in the as-cast state and after hot forging was assessed in the macro scale by OES and by EDS measurements in different structural constituents. The structural investigations were carried out using light and scanning electron microscopy. A special attention was paid to the effect of Nb microaddition on the structure and the segregation of alloying elements. The tendency of Mn and Al to macrosegregation was found. It is difficult to remove in Nb-free steels. Microsegregation of Mn and Al between austenite and ferritic structural constituents can be removed.

Publisher

The Katowice Branch of the Polish Academy of Sciences

Date

2012

Type

Artykuły / Articles

Identifier

ISSN 2299-2944

References

E. De Moor (2010), Strategies for third-generation advanced high-strength steel development, Iron and Steel Technology, 7/11, 133. ; Merwin M. (2008), Microstructure and properties of cold rolled and annealed low-carbon manganese TRIP steels, Iron and Steel Technology, 5/10, 66. ; Kim S. (2010), Effects of manganese content and heat treatment condition on mechanical properties and microstructure of fine-grained low-carbon TRIP-aided steels, Materials Science Forum, 638-642, 3313, doi.org/10.4028/www.scientific.net/MSF.638-642.3313 ; B. De Cooman (2010), Ultra-fine grained manganese TRIP steel, null, 1. ; Grajcar A. (2011), Softening kinetics in Nb-microalloyed TRIP steels with increased Mn content, Advanced Materials Research, 314-316, 119, doi.org/10.4028/www.scientific.net/AMR.314-316.119 ; Pichler A. (2007), Processing of thin multiphase steel grades, Steel Research International, 78, 216. ; Wietbrock B. (2010), Homogenization strategy and material characterization of high-manganese TRIP and TWIP steels, Materials Science Forum. 638-642, 3134, doi.org/10.4028/www.scientific.net/MSF.638-642.3134 ; Grajcar A. (2011), Microstructural characterization of novel increased-manganese content TRIP steels, null, 1. ; Grajcar A. (2011), Effects of Mn and Nb on the macro- and microsegregation in high-Mn high-Al content TRIP steels, Archives of Materials Science and Engineering, 49/1, 5. ; Bhattacharya D. (2011), Perspectives on coated advanced high strength steels for automotive applications, null, 3. ; Zajac S. (2005), Characterisation and quantification of complex bainitic microstructures in high and ultra-high strength linepipe steels, Materials Science Forum, 500-501, 387.

DOI

10.2478/v10266-012-0049-2

×