TY JOUR TI FRACTURE MECHANISM OF 09G2S LOW-ALLOY STEEL WELDED SAMPLE SUBJECTED TO HEAT TREATMENT AND EQUAL CHANNEL ANGULAR PRESSING DURING IMPACT BENDING KW steel KW welded joint KW tempering KW equal channel angular pressing KW fractography KW fracture mechanism JO Bulletin of Bryansk state technical university AU Ivanov, A.M. AU Aleksandrova, E.S. PY 2020 IS 2020 PB Bryansk State Technical University