| Autor: |
Z. H. Li, T. T. Sasaki, M. Z. Bian, T. Nakata, Y. Yoshida, N. Kawabe, S. Kamado, K. Hono |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
The Minerals, Metals & Materials Series ISBN: 9783030366469 |
| DOI: |
10.1007/978-3-030-36647-6_18 |
| Popis: |
We investigated the effects of Zn additions on the mechanical properties and microstructure of Mg–1.2Al–0.5Ca–0.4Mn and Mg–1.2Al–0.5Ca–0.4Mn–1.6Zn (wt%) alloy sheets fabricated by twin-roll casting and conventional hot rolling. The room temperature stretch formability of the solution-treated alloy sheet is improved by the addition of Zn. The Mg–1.2Al–0.5Ca–0.4Mn–1.6Zn alloy shows an excellent stretch formability with the larger Index Erichsen value of 8.2 mm due to a weak transverse direction split texture. The development of the weak texture is attributed to the uniform grain growth by the solute segregation to the recrystallized grain boundaries. Subsequent bake-hardening treatment, 2% pre-strain at 170 °C for 20 min leads to substantial increase in strength without the loss of ductility. The bake-hardened Mg–1.2Al–0.5Ca–0.4Mn–1.6Zn alloy exhibits a high tensile yield strength of 235 MPa with an elongation to failure of 27.1%. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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