Microstructural dependence of Fe-high Mn tensile behavior

Supra-Ductile and High-Strength Manganese-TRIP/TWIP Steels for High Energy Absorption Purposes.

“…This unique feature of the stress-strain curve is typical for TRIP steels. [6][7][8][9][10] In contrast the steel with 25 mass% Mn and additions of 3 mass% Al/Si does not show any change in the curvature of the stress-strain curve. X-ray diffraction analysis revealed that neither a Ms bcc -nor e Ms hcp -martensite was formed.…”

Characterization of Evolution of Microscopic Stress and Strain in High-Manganese Twinning-Induced Plasticity Steel

“…Shigeru SUZUKI, 1) * Koji HOTTA, 1) Eui Pyo KWON, 2) Shun FUJIEDA, 1) Kozo SHINODA, 1) Masayoshi KUMAGAI, 3) Kentaro KAJIWARA, 4) Masugu SATO 4) and Shigeo SATO 5) 1) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai, Miyagi, 980-8577 Japan.…”

“…[1][2][3][4] As the mechanical properties of these steels are often related with the formation of mechanical twins by deformation, these steels are called twinning-induced plasticity (TWIP) steels. The mechanical properties, [5][6][7][8][9][10][11][12][13][14][15] deformation mechanisms associated with stacking fault energies (SFE), [16][17][18][19][20][21][22][23] the thermodynamic properties, 24,25) and the microstructure [26][27][28][29][30][31] of the TWIP steels have been extensively investigated.…”

Effects of Si on Tensile Properties Associated with Deformation-Induced ε-Martensitic Transformation in High Mn Austenitic Alloys

“…16,20) The other important factor dominating uniform elongation, namely embrittlement, must also be considered here. Equation (1) is not satisfied in case of brittle fracture. The ¾-martensitic transformation possibly causes £/¾ interface cracking, 12) intergranular cracking, 15,20) and annealing twin boundary cracking.…”

“…In particular, the embrittlement 1215) and work hardening behavior 1,2,1618) associated with the ¾-martensitic transformation are critical factors in controlling the mechanical properties of high-Mn steels.…”