Comparison of microfractographic behaviour of acicular ferrite and bainite and hydrogen cracking resistance

• Autorzy: Mazancova E. , Jonsta Z. , Mazanec K.
• Języki publikacji: EN

Abstrakty

EN

Materials characterized as TRIPLEX having decreased density are constituted on the following chemical composition usually: Fe-26/30Al-0.9/1.2C. Alloy microstructure is preferentially based on the FCC arrangement. Further, microstructure consists of nano-size carbides regularly dispersed in the FCC matrix and of low ferritic particle content (8% approximately). The strength level of this material is immediately connected with the solid solution strengthening forming the matrix basis. Besides this effect, it is useful to take into consideration process of its strengthening due to precipitated fine carbides (above mentioned nano-size k-carbides). The preferential effect of this material is connected with its high absorption capacity (double capacity in comparison with the conventional deep drawing steels applied in automotive industry). The formation of uniformly arranged shear bands (SIP effect) has very important influence on the realized deformation process of discussed material and the achieved beneficial technical response. This process is also influenced due to regular distribution of nano-size k-carbides being coherent to the FCC matrix. Owing to the density decrease up to 10-12%, attained strength level (1000 MPa), excellent formability and high resistance to dynamic loading (high absorption and achieved dynamic capacity) the presented high manganese material can be held for perspective type for many applications in automotive industry. Further, this material finds a perspective application in cryogenic technique (transport and storage of liquid gases) and in rotating machine elements, too.

Słowa kluczowe

EN

high manganese alloy; nano-size k-carbides; shear bands; stacking fault energy; cracking resistance

PL

stop wysoko magnezowy; nanowęgliki; taśma tnąca; energia błędu ułożenia; odporność na pękanie

• Wydawca: Komitet Nauki o Materiałach PAN
• Czasopismo: Archives of Materials Science
• Rocznik: 2007
• Tom: Vol. 28, nr 1-4
• Strony: 90--94
• Opis fizyczny: Bibliogr. 5 poz., rys., tabl.

Twórcy

autor

Mazancova E.

autor

Jonsta Z.

autor

Mazanec K.

• Faculty of Metallurgy and Material Engineering, Technical University of Ostrava, 708 33 Ostrava, Czech Republic,

Bibliografia

• [1] G. Frommeyer, U. Brux, Microstructures and mechanical properties of high-strength Fe-Mn-Al-C high-weight TRIPLEX steels, Steel Research International 77/9-10 (2006) 627-633.
• [2] S. Allain, J.P. Chateau, O. Bouaziz, S. Migot, N. Guelton, Correlations between the calculated stacking fault energy and the plasticity mechanisms on Fe-Mn-C alloys, Materials. Science Engineering A 387-389 (2004) 158-163.
• [3] A.S. Hamada, M. Somani, Ch. Korjalainen, High temperature flow stress and recrystallisation behaviour of high -Mn TWIP steels, Journal of Iron and Steel Research International 47/6 (2007) 907-912.
• [4] W. Bleck, K. Phiu-on, Ch. Heering, G. Hirt, Hot workability of as cast high manganese-high carbon steel, Steel Research International 78/7 (2007) 536-545.
• [5] C. Scott, S. Allain, M. Faral, N. Guelton, The development of a new Fe-Mn-C austenitic steel for automotive applications, Revue de Metallurgie 103/6 (2006) 293-202.