PSI - Issue 14

ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

Procedia Structural Integrity 14 (2019) 872–882

2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 10.1016/j.prostr.2019.07.066 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 1. Introduction Spray forming process is a material processing technology in which molten metal is transformed into near net shape solid of refined microstructure without any intermediate processing steps. The process is characterized by capturing a spray of gas atomized metal or alloy droplets onto a moving substrate [Lawley and Doherty (1998), Lin et al. (2007), Catto et al. (2011), Lin et al. (2005)]. A typical illustration of Spray forming process is shown in Fig. 1. In this process solidification takes place in two stages, where solidification begins at higher rate when metal droplet is in air and completes at slower rate when the same is on substrate [Catto et al. (2011)]. * Corresponding author. Tel.: 020-6727-1974 E-mail address: Santosh.kumar@bharatforge.com * Corresponding author. Tel.: 020-6727-1974 E-mail address: Santosh.kumar@bharatforge.com 2nd International Conference on Structural Integrity and Exhibition 2018 An Investigation of Performance of Spray Formed H13 Tool Steel Santosh Kumar a *, Pravin Jadhav a , Akshay Patil a , Shreyas Kirwai a , Rajkumar Singh a a Kalyani Centre for Technology & Innovation, Bharat Forge Ltd, Pune- 411036, Maharashtra, India Spray Forming is a material processing technology in which molten metal is transformed into near net shape solid by capturing spray of atomized metal or alloy onto a moving substrate. In the present work, performance of spray formed tool steel, H13 is investigated in terms of tensile, Charpy impact and fracture toughness properties which are then compared with that of conventional route steel. The analysis was done in two hardness ranges i.e. 44~46 HRc and 48~50 HRc. Tensile test results show that YS, UTS, %El and %RA are similar for both route materials at both hardness ranges. Charpy impact strength obtained for spray formed route steel is lower in all three directions as compared to that of conventional route steel. Fracture toughness results, at higher hardness range, show that K IC value obtained for spray formed route steel is approximately 19.5% & 33.3% lower than that of conventional route steel in LS and TS orientations, respectively. The same at lower hardness range is approximately 28.7% and 24.8% lower for spray formed route steel when compared with that of conventional rote steel in LS and TS orientations, respectively. Metallography and SEM has been done to establish reasons behind the better performance of conventional route steel. 2nd International Conference on Structural Integrity and Exhibition 2018 An Investigation of Performance of Spray Formed H13 Tool Steel Santosh Kumar a *, Pravin Jadhav a , Akshay Patil a , Shreyas Kirwai a , Rajkumar Singh a a Kalyani Centre for Technology & Innovation, Bharat Forge Ltd, Pune- 411036, Maharashtra, India Abstract Spray Forming is a material processing technology in which molten metal is transformed into near net shape solid by capturing spray of atomized metal or alloy onto a moving substrate. In the present work, performance of spray formed tool steel, H13 is investigated in terms of tensile, Charpy impact a d fracture toughness properties which are th n compared with that of conventional route st el. The analysis was done in two hardness rang i.e. 44~46 HRc and 48~50 HRc. Tensile test results show that YS, UTS, %El and %RA are similar for both route materials at both hardness ranges. Ch py impa t strength obtained f r spray formed route st el is lower in all three directions as compared to that of conventional route ste l. Fracture toughness results, at higher hardness range, how that K IC value obt ined for spray fo med route steel is approximately 19.5% & 33.3% lower than that of conventional route steel in LS and TS orientations, respectively. The same at lower h rdness range i approximately 28.7% and 24.8% lower for spray form d route steel when compared with that of conventional rote steel in LS and TS orientations, respectively. Metallography and EM has been done to tablish reasons behind the b tter perform c of conventional route steel. 1. Introduction Sp ay formi g process is a material processing technology in which molten metal is transformed into near net shape solid of refined microstructure without any intermediate processing steps. The process is characterized by capturing a spray of gas atomized metal or alloy droplets onto a moving subs rate [L wley d Doh rty (1998), Lin et l. (2007), Catto et al. (2011), Lin t al. (2005)]. A typical illustration of Spray forming process is s own in Fig. 1. In this process solidification takes place in tw stages, where solidification egins at higher rate w n metal droplet is in air and completes at slower rate when the same is on substrate [Catt et al. (2011)]. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. Abstract Keywords: Spray Forming; H13; Charpy impact strength; Fracture toughness Keywords: Spray Forming; H13; Charpy impact strength; Fracture toughness