Specification for carbon-manganese steel sheet and strip (for use in the hardened and tempered condition: 770/1000 MPa) (suitable for welding)

1969 ◽  
Keyword(s):  
Steel Sheet ◽  
Manganese Steel

scholarly journals Microstructure and Mechanical Properties of Gas Tungsten Arc Welded High Manganese Steel Sheet

Metals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1167 ◽  
Author(s):  
Geon-Woo Park ◽  
Haeju Jo ◽  
Minha Park ◽  
Sunmi Shin ◽  
Won-Seok Ko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Base Metal ◽  
Steel Sheet ◽  
Weld Zone ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
Gas Tungsten Arc ◽  
Microstructure And Mechanical Properties

This study investigated microstructure and mechanical properties of high manganese steel sheet fabricated by gas tungsten arc welding (GTAW). The weld zone showed longitudinal coarse grains due to the coalescence of columnar dendrites grown into the direction of heat source, and the HAZ showed equiaxed coarser grains than the base metal due to the thermal effect of GTAW process. Mn segregation occurred in the inter-dendritic regions of the weld zone and Mn depletion thus occurred in the weld matrix. Although the stacking fault energy is expected to be lowered due to the Mn depletion, no noticeable change in the initial phase and deformation mechanism was found in the weld matrix. Lower hardness and strength were shown in the weld zone than the base metal, which was caused by the coarser grain size. The negative strain rate sensitivity observed in the weld zone and the base metal is considered to have originated from the negative strain rate dependency of twinning nucleation stress.

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