Microstructure and hardness characterisation of laser coatings produced with a mixture of AISI 420 stainless steel and Fe-C-Cr-Nb-B-Mo steel alloy powders

Sun, Shoujin; Fabijanic, Daniel; Ghaderi, Alireza; Leary, Martin; Toton, J; Sun, Shoujin; Brandt, Milan; Easton, Mark

doi:10.1016/j.surfcoat.2016.03.061

Cited by 24 publications

(11 citation statements)

References 33 publications

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“…This result can be supported with the findings of Da Sun et al 14 obtained during a study of the microstructure of a laser-cladding coating made of AISI 420, in which the volume of retained austenite was below the detection limit of the diffractometer. S. Dodds et al 15 also reported XRD patterns of as-quenched AISI 420 samples, where no reflections corresponding to the retained austenite could be seen.…”

Section: Discussionsupporting

confidence: 89%

“…It should be noted that this mechanism requires the presence of significant amounts of retained austenite after the quenching and before the cryogenic cooling, which is not expected to be the case for AISI 420 due to its chemical composition and excellent hardenability. 14,15 In our prior work 16 , we tested several processing routes, and the one which yielded the best combination of properties was selected to continue studying the effect of cryogenic treatments on tribological properties and fracture toughness in the context of a PhD thesis. 17 Regarding the wear behavior, we reported, in a preliminary article 10 , that cryogenic treatments increase the wear resistance of AISI 420 by 35-90 % in comparison to conventionally treated specimens.…”

Section: Introductionmentioning

confidence: 99%

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Influence of a cryogenic treatment on the fracture toughness of an AISI 420 martensitic stainless steel

Prieto¹,

Tuckart²,

Ipiña³

2017

Mater. Tehnol.

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Cryogenic treatments have been employed over the past three decades for both tool and high-alloy steels to improve their wear resistance, mainly through the transformation of retained austenite and the precipitation of fine carbides. However, as the enhancement of one material property is often at the expense of another, it is interesting to evaluate the effect of this type of treatments on the fracture toughness. The objective of the present work was to determine the plane-strain fracture toughness of a cryogenically treated low-carbon AISI 420 martensitic stainless steel by means of standardized fracture tests, performed in accordance with the ASTM E399 and ASTM E1820 standards. In this study, it was experimentally demonstrated that cryogenically treated specimens showed a simultaneous increase in the KIC and hardness of 30 % and 5 %, respectively, compared to conventionally treated specimens. Keywords: cryogenic treatment, carbide refinement, plane-strain fracture toughness, low-carbon martensitic stainless steel Obdelava s podhlajevanjem v zadnjih treh desetletjih, tako za orodja kot za visokolegirana jekla, pomeni izbolj{anje njihove odpornosti proti obrabi, predvsem zaradi preoblikovanja zadr`anega avstenita in zgo{~evanja finih delcev. Kakorkoli`e, izbolj{anje enega materiala je pogosto, vendar na ra~un drugega, zato je zanimivo oceniti u~inek takega tipa obdelave na lomnò ilavost. Predmet pri~ujo~ega dela je bila dolo~itev lomne`ilavosti kriogensko obdelanega nizkoogljikovega martenzitnega nerjave~ega jekla AISI 420, s pomo~jo standardiziranih testov zlomov, izvedenih v skladu s standardoma ASTM E399 in ASTM E1820. V {tudiji je bilo s poizkusi dokazano, da so kriogensko obdelani vzorci pokazali hkratno pove~anje KCI in trdote za 30 % in 5 %, v primerjavi s konvencionalno obdelanimi vzorci. Klju~ne besede: obdelava s podhlajevanjem, pre~i{~enje delcev, lomna`ilavost, nizkoogljo~no martenzitno nerjave~e jeklo

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Influence of a cryogenic treatment on the fracture toughness of an AISI 420 martensitic stainless steel

Prieto¹,

Tuckart²,

Ipiña³

2017

Mater. Tehnol.

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“…Laser cladding, as a simple but efficient surface modification technique, has been extensively utilized in different industrial fields such as surface coating functionalization, component repair and additive manufacturing under harsh service conditions [1,2]. AISI 420 martensitic stainless steel (SS) has been considered as one of the potential alloys for creating additive manufacturing functional coatings/components owing to its high mechanical properties, moderate corrosion resistance and tailored properties by the subsequent heat treatment [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

Zhu

et al. 2018

Coatings

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Post-treatment is crucial to improve the comprehensive performance of laser-cladded martensitic stainless steel coatings. In this work, a low-temperature tempering treatment (210 °C), for the first time, was performed on the laser-cladded AISI 420 martensitic stainless steel coating. The microstructure and properties of the pre- and post-tempering specimens were carefully investigated by XRD, SEM, TEM, a micro-hardness tester, a universal material testing machine and an electrochemical workstation. The results show that the as-cladded AISI 420 stainless steel coating mainly consisted of martensite, austenite, Fe3C and M23C6 carbides. The phase constituent of the coating remained the same, however, the martensite decomposed into finer tempered martensite with the precipitation of numerous nano-sized Fe3C carbides and reverted austenite in the as-tempered specimen. Moreover, a slight reduction was found in the micro-hardness and tensile strength, while a significant increase in elongation was achieved after tempering. The fractography showed a transition from brittle fracture to ductile fracture accordingly. The as-tempered coating exhibited a striking combination of mechanical properties and corrosion resistance. This work can provide a potential strategy to enhance the overall properties of the laser-deposited Fe-based coating for industrial applications.

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“…The appearance of a liquid phase in order to obtain a sinter of high density may be induced by proper chemical modification of base alloy with elements or compounds that activate the sintering process [4,5]. Numerous researches have indicated that boron is an excellent activator for the liquid phase sintering process of ferrous alloys [6][7][8]. The addition of boron to iron creates a low-melting point (1177°C) eutectic liquid, which intensifies the sintering process by acting in three stages: an initial stage of solubility and rearrangement, an intermediate stage of solution and reprecipitation, and a final stage of microstructural coarsening [9].…”

Section: Introductionmentioning

confidence: 99%

Influence of mechanical alloying on surface layer of P/M AISI 316L powder with addition of FeNiMnSiB master alloy

Sulikowska

Skałoń

Kozub

et al. 2016

Surface and Coatings Technology

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Microstructure and hardness characterisation of laser coatings produced with a mixture of AISI 420 stainless steel and Fe-C-Cr-Nb-B-Mo steel alloy powders

Cited by 24 publications

References 33 publications

Influence of a cryogenic treatment on the fracture toughness of an AISI 420 martensitic stainless steel

Influence of a cryogenic treatment on the fracture toughness of an AISI 420 martensitic stainless steel

Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

Influence of mechanical alloying on surface layer of P/M AISI 316L powder with addition of FeNiMnSiB master alloy

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