Mechanical Properties of 18Ni-300 maraging steel manufactured by LPBF

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F19%3A43972693" target="_blank" >RIV/49777513:23210/19:43972693 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2452321619303208?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321619303208?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2019.08.112" target="_blank" >10.1016/j.prostr.2019.08.112</a>

Result language

angličtina

Original language name

Mechanical Properties of 18Ni-300 maraging steel manufactured by LPBF

Original language description

The purpose of this document is to investigate the influence of heat treatment on the mechanical properties of parts from MAR 300 (EN 1.2709) produced by LPBF. In order to compare the influence of the heat treatment on the parts properties, some parts were in the state solution annealed and others age hardened tested. For the quality in the LPBF the feedstock powder as starting material is of great importance. Therefore, powder characterization has been performed in order to work out ageing effects after multiple use. As a major ageing effect an increasing oxygen content could be identified which might affect process and parts quality. For industrial acceptance, AM parts need to be produced to the best available tolerances and with well-understood mechanical properties. For this purpose, the mechanical properties of the LPBF samples have been analysed and are compared to those properties for conventional samples. In this investigation, the mechanical tests (hardness test, tensile test and notch impact resistance) have been performed in horizontal and vertical directions of manufacturing by LPBF. The hardness increased from 333341 HV10 to 640656 HV10 after heat treatment. Simultaneously, the ultimate tensile strength (Rm) increases from 10561096 MPa to 19642102 MPa, while the break elongation (stot) is reduced from 11.316.0% to 2.04.5%. Aged samples show a significant decrease in toughness in the Notch Impact Test. A specifically designed ball joint test setup has shown that the frame manufactured by LPBF provides comparable results as a conventionally manufactured frame and is robust and suitable for the prototype production and test of car headlamps. (C) 2019 The Authors. Published by Elsevier B.V.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Procedia Structural Integrity

ISBN

—

ISSN

2452-3216

e-ISSN

2452-3216

Number of pages

7

Pages from-to

843-849

Publisher name

Elsevier Science BV

Place of publication

Amsterdam

Event location

Funchal, Madeira

Event date

Sep 2, 2019

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

000505162900111