TY CONF TI INFLUENCE OF MATRIX GRAIN PARAMETERS ON THE IMPACT STRENGTH OF 20GL STEEL CAR CASTINGS KW statistical and microstructural analyses KW impact strength KW side frame KW spring beam KW 20gl steel JO Ensuring and improving the quality of engineering and aerospace products AU Bogdanov, R.A. AU Davydov, S.V. AU Panov, A.G. PY 2024 PB Bryansk State Technical University