View in EDS

A simultaneous enhancement of both strength and ductility by a novel differential-thermal ECAP process in Mg-Sn-Zn-Zr alloy.

Saved in:
Bibliographic Details
Title: A simultaneous enhancement of both strength and ductility by a novel differential-thermal ECAP process in Mg-Sn-Zn-Zr alloy.
Authors: Zhou, Tianshui1,2 (AUTHOR), Zhang, Quanfa1,2 (AUTHOR), Li, Qianqian1,2 (AUTHOR), Wang, Lidong1,2 (AUTHOR), Li, Qinglin1,2 (AUTHOR), Liu, Dexue1,2 (AUTHOR) dxliu@lut.cn
Source: Journal of Alloys & Compounds. Dec2021, Vol. 889, pN.PAG-N.PAG. 1p.
Subjects: Magnesium alloys, Alloys, Ductility, Grain refinement, Crystal grain boundaries, Magnesium
Abstract: • A novel differential-thermal ECAP process, showing good extrudability and mechanical properties of TZK alloys, was developed. • After 4p-DTECAP processing, the TZK alloys showed high TYS of ~311 MPa and good El. of ~20.5%. • The activation of prismaticslip, grain refinement and texture weakening were responsible for the superior performance. • DTECAP process may provide a new insight to simultaneous improvement of workability and mechanical properties of Mg alloys. Equal-channel angular pressing (ECAP) technique has emerged as a desirable strategy to fairly improve the properties of magnesium (Mg) alloys. However, poor workability of Mg alloys results in the failure of ECAP processing. Herein, a novel differential-thermal ECAP (DTECAP) process, simultaneously endowing Mg-Sn-Zn-Zr (TZK) alloys with good deformability and superior mechanical properties, was developed. Analysis of deformation microstructures of TZK alloys revealed that the excellent comprehensive properties were mainly associated with the activation of non-basal slip, grain refinement, and texture weakening. The results indicated that prismaticslip was predominant deformation mode of DTECAP TZK alloys, which contributed significantly to the improvement of strength and ductility (tensile yield strength of ~311 MPa and elongation of ~20.5%). Moreover, the presence of astonishingly submicron scale grains (down to ~1.35 µm) was responsible for the high strength in DTECAP TZK alloys. In particular, high angular grain boundaries contributed to the highest strengthening effects. Besides, after DTECAP processing, a strong basal<0001>// ND-preferred texture was weakened from 13.48 to 9.38 (m.r.d.), and exhibited ED-split components. The current study can provide beneficial insights into the development of high-performance Mg alloys via DTECAP processing. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:• A novel differential-thermal ECAP process, showing good extrudability and mechanical properties of TZK alloys, was developed. • After 4p-DTECAP processing, the TZK alloys showed high TYS of ~311 MPa and good El. of ~20.5%. • The activation of prismatic<a>slip, grain refinement and texture weakening were responsible for the superior performance. • DTECAP process may provide a new insight to simultaneous improvement of workability and mechanical properties of Mg alloys. Equal-channel angular pressing (ECAP) technique has emerged as a desirable strategy to fairly improve the properties of magnesium (Mg) alloys. However, poor workability of Mg alloys results in the failure of ECAP processing. Herein, a novel differential-thermal ECAP (DTECAP) process, simultaneously endowing Mg-Sn-Zn-Zr (TZK) alloys with good deformability and superior mechanical properties, was developed. Analysis of deformation microstructures of TZK alloys revealed that the excellent comprehensive properties were mainly associated with the activation of non-basal slip, grain refinement, and texture weakening. The results indicated that prismatic<a>slip was predominant deformation mode of DTECAP TZK alloys, which contributed significantly to the improvement of strength and ductility (tensile yield strength of ~311 MPa and elongation of ~20.5%). Moreover, the presence of astonishingly submicron scale grains (down to ~1.35 µm) was responsible for the high strength in DTECAP TZK alloys. In particular, high angular grain boundaries contributed to the highest strengthening effects. Besides, after DTECAP processing, a strong basal<0001>// ND-preferred texture was weakened from 13.48 to 9.38 (m.r.d.), and exhibited ED-split components. The current study can provide beneficial insights into the development of high-performance Mg alloys via DTECAP processing. [ABSTRACT FROM AUTHOR]
ISSN:09258388
DOI:10.1016/j.jallcom.2021.161653