Effect of Al and Mo addition on phase formation, mechanical and microstructure properties of spark plasma sintered iron alloy. (December 2017)

• Record Type: Journal Article
• Authors: Ghasali, Ehsan; Palizdar, Yahya; Jam, Alireza; Rajaei, Hosein; Ebadzadeh, Touradj
• Is Part Of: Materials today communications. Volume 13(2017)
• Page Start: 221
• Page End: 231
• Publication Date: 2017-12
• Subjects: Iron -- Aluminum -- Molybdenum -- Spark plasma sintering; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2017.10.005
• Languages: English
• ISSNs: 2352-4928

Abstract

Highlights: Fe-Al-Mo alloys were prepared by using spark plasma sintering methods. Properties of Fe-Al-Mo alloys can be changed by anneal process. Intermetallic compounds can improve the mechanical properties of prepared specimens. Abstract: The effect of aluminum (Al) and molebdenium (Mo) addition on the phase formation and final properties of iron based alloys has been investigated by powder metallurgy route and spark plasma sintering process. Compounds containing iron (Fe)- 5 wt% Al, Fe-5 wt% Mo and Fe-5 wt% Al and 5 wt% Mo were prepared using a high-energy mixer after milling for 10 min. In order to achieve maximum displacement, the sintering process was performed in the temperature range of 600–650 °C. Furthermore, the sintered samples were annealed at 1100 °C for 2 h in argon atmosphere. The obtained results indicated that all samples reached to a high enough density at low sintering temperatures and when sintering was performed at high temperatures, the partial melting occurred. The XRD and FESEM investigations revealed the formation of FeMo and AlFe intermetallic and solid solution phases when both Al and Mo additives were used together. Fe-5 wt% Mo-5 wt% Al sample obtained the maximum bending strength (730 ± 31 MPa) and hardness (530 ± 27 Vickers) after sintering at temperature of 630 °C.