Grant: Engage Plus Grants Program
École de technologie supérieure
$12,500.00
The influence of thermal hardening on mechanical properties and microstructural evolutions of as-printed carbon steel
EF 2019-20
Résumé
Additive Manufacturing (AM) is recent concept in fabrication to produce parts with different metallic materialssuch as steels, titanium alloys, superalloys, biocompatible metals as raw, semi-final, or final products for whichmaterial is added layer by layer instead of being formed by conventional shaping processes. In some industriessuch as biomaterials, aerospace, marine; technology readiness level (TRL) has gained enough to producecertified parts that could be competitive with their conventional versions as the process allows adapting eachpart to the specific need. However, the mechanical properties may not meet the expectations in service due tocomplex microstructure formed during AM processes.In the first step of the project, two different types of steels fabricated by two different process parameters werereceived. The main objective was to investigate the possible microstructural modification obtained fromchanging process parameters during printing. Using electron back scattered phase (EBSP) and localmisorientation maps, our first deliverable (2 first months - by end of January 2019) was to identify the strainheterogeneity formed during printing by interpreting data acquired from EBSD analysis. One of the sampleswas a stainless steel and the other one was a carbon steel.For the continuation of research work developed so far, it is necessary to get involved with mechanicalproperties. In this regard, initial hardness measurements were applied on carbon steels after thermal hardeningtreatment. This alloy is prioritized on request of our partner. It was found that changing process parametersduring printing affects the hardness value in carbon steel samples causing severe macro-cracking duringthermal hardening after printing. This confirms the literature talking about premature fracture for thermallyhardened carbon steels after printing [7]. Therefore, for the next step of our collaboration, it is necessary tocontinue the research work in a way to modify the thermal treatment required after printing in order to identifyoptimum thermal hardening process parameters according to the microstructure obtained during printing.
Programme
Engage Plus Grants Program
Bénéficiaire
Emplacement
Quebec, Canada
Type de bénéficiaire
Academia
Type
Grant
Source
NSERC's Awards Data
Tel que publié
Application id
544439-2019
Name nom
Nuño, Natalia
Department département
Génie de la production automatisée
Organization id
53
Institution établissement
École de technologie supérieure
Province en
Québec
Province fr
Québec
Country en
CANADA
Country fr
CANADA
Fiscal year exercice financier
2019
Competition year année de concours
2019
Award amount
12500
Program id
EGP2
Program name en
Engage Plus Grants Program
Program name fr
Programme de subvention d'engagement partenarial Plus
Group en
RESEARCH PARTNERSHIPS
Group fr
PARTENARIATS DE RECHERCHE
Committee code
1552
Committee name en
Quebec Internal Decision Committee
Committee name fr
Comité de décision interne pour le Québec
Area of application code
510
Area of application group en
Manufacturing processes and products
Area of application group fr
Procédés et produits industriels
Area of application en
Fabricated metal products
Area of application fr
Produits métalliques usinés
Research subject code
2001
Research subject group en
Materials science and technology
Research subject group fr
Science et technologie des matériaux
Research subject en
Materials structure, properties and testing
Research subject fr
Structure, propriétés et essais des matériaux
Installment
inst:1 - 1
Partie
1
Nb partie
1
Application title
The influence of thermal hardening on mechanical properties and microstructural evolutions of as-printed carbon steel
Keyword
NSERC
Application summary
Additive Manufacturing (AM) is recent concept in fabrication to produce parts with different metallic materialssuch as steels, titanium alloys, superalloys, biocompatible metals as raw, semi-final, or final products for whichmaterial is added layer by layer instead of being formed by conventional shaping processes. In some industriessuch as biomaterials, aerospace, marine; technology readiness level (TRL) has gained enough to producecertified parts that could be competitive with their conventional versions as the process allows adapting eachpart to the specific need. However, the mechanical properties may not meet the expectations in service due tocomplex microstructure formed during AM processes.In the first step of the project, two different types of steels fabricated by two different process parameters werereceived. The main objective was to investigate the possible microstructural modification obtained fromchanging process parameters during printing. Using electron back scattered phase (EBSP) and localmisorientation maps, our first deliverable (2 first months - by end of January 2019) was to identify the strainheterogeneity formed during printing by interpreting data acquired from EBSD analysis. One of the sampleswas a stainless steel and the other one was a carbon steel.For the continuation of research work developed so far, it is necessary to get involved with mechanicalproperties. In this regard, initial hardness measurements were applied on carbon steels after thermal hardeningtreatment. This alloy is prioritized on request of our partner. It was found that changing process parametersduring printing affects the hardness value in carbon steel samples causing severe macro-cracking duringthermal hardening after printing. This confirms the literature talking about premature fracture for thermallyhardened carbon steels after printing [7]. Therefore, for the next step of our collaboration, it is necessary tocontinue the research work in a way to modify the thermal treatment required after printing in order to identifyoptimum thermal hardening process parameters according to the microstructure obtained during printing.
