Structure and Mechanical Properties of the 18Ni300 Maraging Steel Produced by Spark Plasma Sintering

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43923064" target="_blank" >RIV/60461373:22310/21:43923064 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2075-4701/11/5/748/htm" target="_blank" >https://www.mdpi.com/2075-4701/11/5/748/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met11050748" target="_blank" >10.3390/met11050748</a>

Result language

angličtina

Original language name

Structure and Mechanical Properties of the 18Ni300 Maraging Steel Produced by Spark Plasma Sintering

Original language description

In this work, a new approach for compaction of the gas-atomized 18Ni300 maraging steel at two different temperatures of 1050 degrees C and 1150 degrees C using a progressive SPS technology is studied. Moreover, the influence of two heat treatments combining solution annealing and aging (SAT) and simply aging treatment (AT) on the microstructure and mechanical properties is investigated. It is found that samples compacted at 1050 degrees C had higher porosity compared to the almost non-porous material produced at 1150 degrees C. In addition, the difference of 100 degrees C for the compaction temperature successfully reduces the porosity from 0.86% down to 0.08%. Additionally, we discovered that the higher the compaction temperature, the higher the amount of retained gamma-Fe which positively affects the ductility of the samples. The subsequential heat treatment results in precipitation strengthening via the Ni3Mo precipitates. Microhardness of the SPS1050 and SPS1150 samples increase from 303 +/- 13 HV0.1 and 360 +/- 5 HV0.1 to 563 +/- 31 HV0.1 and 606 +/- 17 HV0.1, respectively. The sample compacted at 1150 degrees C shows the highest ultimate tensile strengths reaching up to 1940 +/- 6 MPa, while also showing 4% ductility.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

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

Name of the periodical

Metals

ISSN

2075-4701

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

5

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

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UT code for WoS article

000662517800001

EID of the result in the Scopus database

2-s2.0-85121936360