Keywords High manganese austenitic steel;Cryogenic intergranular fracture;Grain-boundary doping effect;Elestroslag-remelting;Nitrogen strengthening;Strain hardening;Weldability;

• 高锰奥氏体钢;低温沿晶脆性;晶界掺杂效应;电渣重熔;氮强化;应变硬化;焊接性;