Semantic Scholar Open Access 2019 172 sitasi

Elevated temperature microstructural stability in cast AlCuMnZr alloys through solute segregation

A. Shyam Shibayan Roy Dongwon Shin J. Poplawsky L. Allard +7 lainnya

Lihat Sumber DOI

Abstrak

Abstract Commonly used commercial cast aluminum alloys for the automotive industry are viable for temperatures only up to 250 °C, despite decades of study and development. Affordable cast aluminum alloys with improved high-temperature mechanical properties are needed to enable the next generation of higher efficiency passenger car engines. Metastable θ′ (Al2Cu) precipitates contribute to strengthening in Al–Cu alloys, but above 250 °C coarsen and transform, leading to poor mechanical properties. A major challenge has been to inhibit coarsening and transformation by stabilizing the metastable precipitates to higher temperatures. Here, we report compositions and associated counter-intuitive microstructures that allow cast Al–Cu alloys to retain their strength after lengthy exposures up to 350 °C, ∼70% of their absolute melting point. Atomic-scale characterization along with first-principles calculations demonstrate that microalloying with Mn and Zr (while simultaneously limiting Si to

Topik & Kata Kunci

Materials Science

Penulis (12)

A. Shyam

Shibayan Roy

Dongwon Shin

J. Poplawsky

L. Allard

Y. Yamamoto

J. R. Morris

B. Mazumder

J. Idrobo

A. Rodríguez

T. Watkins

J. Haynes

Format Sitasi

APA MLA BibTeX

Shyam, A., Roy, S., Shin, D., Poplawsky, J., Allard, L., Yamamoto, Y. et al. (2019). Elevated temperature microstructural stability in cast AlCuMnZr alloys through solute segregation. https://doi.org/10.1016/J.MSEA.2019.138279

Akses Cepat

Lihat di Sumber doi.org/10.1016/J.MSEA.2019.138279

Informasi Jurnal

Tahun Terbit: 2019
Bahasa: en
Total Sitasi: 172×
Sumber Database: Semantic Scholar
DOI: 10.1016/J.MSEA.2019.138279
Akses: Open Access ✓