Effects of Substrate Composition and Treatment Times on the Erosive Wear of Titanium Aluminide Coating: Prepared By Pack Cementation
| Autor: | Said Boudebane, H. Ghouss |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope 020209 energy Materials Science (miscellaneous) chemistry.chemical_element 02 engineering and technology engineering.material Indentation hardness chemistry.chemical_compound Hot working 0203 mechanical engineering Coating 0202 electrical engineering electronic engineering information engineering Materials Chemistry Titanium aluminide Mechanical Engineering Metallurgy technology industry and agriculture Metals and Alloys Microstructure 020303 mechanical engineering & transports chemistry Mechanics of Materials Tool steel engineering Titanium |
| Zdroj: | Journal of Bio- and Tribo-Corrosion. 7 |
| ISSN: | 2198-4239 2198-4220 |
| DOI: | 10.1007/s40735-020-00438-8 |
| Popis: | This present work aims to investigate the effect of processing time on the erosion resistance of 316 stainless steel and AISI H13 hot working tool steel treated by pack cementation. For this purpose, aluminum and titanium elements were simultaneously deposited on the surface of the two steels at 1050 °C for 4, 8 and 12 h using a pack mix containing an NH4Cl-based activator. The erosion wear experiments were conducted using both air jet and sand blast erosion equipment at impact angles of 30° and 90°. The microstructures of the two studied steels, in terms of surface morphology and related formed phases, were investigated using X-ray diffraction, scanning electron microscope (SEM) equipped with an energy dispersive X-ray spectroscope (EDS), while the hardness and the erosion resistance of the coatings were assessed using Vickers’ microhardness and the weight loss per unit mass erodent, respectively. The results showed that all coatings have high erosion rate values at low impact angle of 30° which is thought to be associated with ductile erosion behavior. Furthermore, the coatings obtained on 316 stainless steel exhibited better erosion resistance than those obtained on AISI H13 steel. SEM analysis of eroded surfaces of all coatings revealed that the predominant erosion mechanism of Ti–Al pack cementation coatings was the formation and extrusion of platelet. |
| Databáze: | OpenAIRE |
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