... 0.50.00.10.20.30.40.50.6Strain hardening coefficientTrue strain Fig. 16. Strain hardening of Fe-18%Mn-0.6%C-1.5%Al TWIP steel. New Trends and Developments in Automotive System Engineering 138 increased, ... twin impinging on a larger primary twin located on the left hand side of the micrograph. New Trends and Developments in Automotive System Engineering 128 Niendorf T., Lotze C., Canadinc ... (20 07) , J. Japan Inst. Metals, vol. 71 , No. 9, 815-821 Bouaziz O., Scott C.P., Petitgrand G. (2009), Scripta Materialia, 69, 71 4 -71 6 New Trends and Developments in Automotive System Engineering...