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Effect of building direction on high strain-rate compressive behavior of heat-treated LPBF-maraging steels using Split Hopkinson pressure bar apparatus
, Article Materials Science and Engineering A ; Volume 835 , 2022 ; 09215093 (ISSN) ; Pirgazi, H ; Sanjari, M ; Seraj, P ; Odeshi, A ; Kestens, L. A. I ; Mohammadi, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Rod-shaped samples of maraging steel were additively fabricated in vertical and horizontal directions using laser powder bed fusion technique. The samples were first aged at 490 °C for 6 h and then subjected to dynamic compressive tests using Split Hopkinson Pressure Bar apparatus. The dynamic compression tests were conducted on vertical samples at strain rates of 190, 460, 810, 1100, 1300 s−1. However, the high strain rate tests were performed at strain rates of 120, 615, 745, 890, 2200 s−1 on horizontal samples. After applying the compressive impact loads on the samples, it was found that although horizontally built samples exhibit higher dynamic strength, vertically built samples show...