Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Microstructure and the Local Mechanical Properties of the 3D Printed Austenitic Stainless Steel: Computer Simulation

Version 1 : Received: 24 August 2020 / Approved: 26 August 2020 / Online: 26 August 2020 (09:18:37 CEST)

A peer-reviewed article of this Preprint also exists.

Hosseinzadeh, H. Microstructure and the Local Mechanical Properties of the 3D Printed Austenitic Stainless Steel at Different Temperatures of the Printer’s Chamber: Computer Simulation. Progress in additive manufacturing 2020 2022, 386–403, doi:10.1520/stp163720210011. Hosseinzadeh, H. Microstructure and the Local Mechanical Properties of the 3D Printed Austenitic Stainless Steel at Different Temperatures of the Printer’s Chamber: Computer Simulation. Progress in additive manufacturing 2020 2022, 386–403, doi:10.1520/stp163720210011.

Abstract

Metal 3D printing technology is a promising manufacturing method, especially in the case of complex shapes. The quality of the printed product is still a challenging issue for mechanical applications. The anisotropy of the microstructure, imperfections, and residual stress are some of the issues that diminish the mechanical properties of the printed sample. The simulation could be used to investigate some technical details, and this research has tried to computationally study the metal 3D printing of austenitic stainless steel to address austenite microstructure and local yield strength. Two computational codes were developed in Visual basics 2015 to simulate the local heating/cooling curve and subsequent austenite microstructure. A stochastic computational code was developed to simulate austenite grain morphology based on calculated thermal history. Then Hall-Pitch equation was used to estimate the yield strength of the printed sample. These codes were used to simulate the effect of temperature of the printer’s chamber on microstructure and subsequent yield strength. The austenite grain topology is more columnar at a lower temperature. The percentage of the equiaxed zone will be increased at a higher chamber’s temperature. Almost a fully equiaxed austenite microstructure will be achieved at 800 C chamber’s temperature, but the last printed layer, which is columnar and can be removed by cutting then. The estimated local austenite grain size and the local yield strength in the equiaxed regions are in the range of 15 to 30 μm and 270 to 330 MPa at 800 C temperature of printer’s chamber, respectively.

Keywords

3D printing; stainless steel; microstructure; mechanical properties; simulation

Subject

Engineering, Mechanical Engineering

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.