Physical Properties of Directionally Solidified Al-1.9Mn-5Fe Alloy

Yılmazer M. İ., Çadırlı E., Kaya H., Büyük U.

Journal Of Materials Engineering And Performance, cilt.30, ss.1603-1610, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s11665-020-05253-3
  • Dergi Adı: Journal Of Materials Engineering And Performance
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1603-1610
  • Erciyes Üniversitesi Adresli: Evet

Özet

Al-1.9Mn-5Fe (wt.%) alloy was prepared by adding 5 wt.% Fe to the eutectic Al-Mn alloy. This alloy undergone controlled solidification under four different growth velocities (V) in Bridgman-type furnace. Eutectic spacings (λ), microhardness (HV), ultimate tensile strength (σU) and electrical resistivity (ρ) of these alloys were determined. While the HV and σU increased with increasing V values or decreasing λ, the elongation (δ) values decreased. In addition, relationships between these parameters were investigated using linear regression analysis. Microstructure photographs of directionally solidified samples were taken by optical microscope and scanning electron microscope (SEM). The eutectic spacings were measured from these photographs. The relationships among growth velocity (V), eutectic spacing (λ), microhardness (HV), ultimate tensile strength (σU) and electrical resistivity (ρ) were measured by suitable method and tests. The ρ measurements were carried out depending on V and temperature (T). While temperature coefficient of resistivity (αTCR) was calculated from the ρ–T curve, the values of thermal conductivity (K) predicted by Wiedemann–Franz (W–F) and Smith–Palmer (S–P) equations. It was found that the microstructure, microhardness, tensile strength and electrical resistivity were affected by both eutectic spacing and the growth velocity.