Design of super-strong and thermally stable nanotwinned Al alloys <i>via</i> solute synergy.

Zhang, Y F; Su, R; Xie, D Y; Niu, T J; Xue, S; Li, Q; Shang, Z; Ding, J; Richter, N A; Wang, Jian; Wang, H; Zhang, X

Design of super-strong and thermally stable nanotwinned Al alloys via solute synergy.

Zhang, Y F; Su, R; Xie, D Y; Niu, T J; Xue, S; Li, Q; Shang, Z; Ding, J; Richter, N A; Wang, Jian; Wang, H; Zhang, X.

Afiliación

Zhang YF; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Su R; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Xie DY; Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.
Niu TJ; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Xue S; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Li Q; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Shang Z; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Ding J; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Richter NA; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.
Wang J; Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.
Wang H; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu and School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA.
Zhang X; School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. xzhang98@purdue.edu zhan2592@purdue.edu.

Nanoscale ; 12(39): 20491-20505, 2020 Oct 15.

Article en En | MEDLINE | ID: mdl-33026022

RESUMEN

Al alloys have widespread industrial applications. However, their mechanical strength is often much lower than steels. Here, we investigate the influence of solutes on achieving ultrahigh strength and thermal stability of nanotwinned Al alloys. In situ micropillar compression tests show the addition of a small amount of Ti can significantly increase the mechanical strength of Al-Ni alloys to 2 GPa. Deformation induced detwinning, Ni segregation and grain coarsening as discovered in binary Al-Ni alloys are mostly absent in the ternary Al-Ni-Ti alloys. Moreover, the ternary Al-Ni-Ti alloys have outstanding thermal stability. Density function theory calculations reveal the synergetic pinning effect of Ni-Ti solute pairs on incoherent twin boundaries. This study demonstrates that the proper selection of synergistic solute pairs is critical to improve the thermal stability and mechanical properties of nanotwinned Al alloys.

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Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2020 Tipo del documento: Article