Optimisation of precipitation hardening for 15-5 PH martensitic stainless steel produced by wire arc directed energy deposition

Ščetinec, Aljaž (author), Klobčar, Damjan (author), Nagode, Aleš (author), Vuherer, Tomaž (author), Bračun, Drago (author), Trdan, Uroš (author)

This paper discusses directed energy deposition of 15-5 PH, which was successfully tailored with precipitation hardening (PH) to achieve the desired properties. Parametric analysis of solution annealing and aging at various time and temperature combinations was performed. Material characterisation was done in the as-deposited, solution annealed, and PH states. Investigations included microscopy, SEM/EDS, fractography, hardness, tensile, and impact toughness test. The as-deposited microstructure was composed of martensite laths along with delta ferrite. Optimisation of solution annealing was mandatory to achieve homogeneous austenite, which allowed PH. PH resulted in similar properties compared to conventionally produced steel. Peak aging resulted in 450 HV10 and an Rm of 1350 MPa, while the over-aged condition resulted in an impact toughness of over 77 J/cm$^2$.

• Language: English
• Keywords: wire arc additive manufacturing, 15-5 PH, solution annealing, aging, precipitation hardening, martensitic stainless steel, material characterisation
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: Str. 558–568
• Numbering: Vol. 28, no. 7
• PID: 20.500.12556/RUL-148265
• UDC: 621.791.75
• ISSN on article: 1362-1718
• DOI: 10.1080/13621718.2023.2202979
• COBISS.SI-ID: 150180355
• Publication date in RUL: 08.08.2023

Record is a part of a journal

• Title: Science and technology of welding and joining
• Shortened title: Sci. technol. weld. join.
• Publisher: Taylor & Francis, Institute of Materials, Minerals and Mining
• ISSN: 1362-1718
• COBISS.SI-ID: 166337

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: oblikovno obločno navarjanje z žico, 15-5 PH, raztopno žarjenje, staranje, izločevalno utrjevanje, martenzitno nerjavno jeklo, karakterizacija materiala