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author:

Zhang, Chenjin (Zhang, Chenjin.) [1] | Yang, Guangyu (Yang, Guangyu.) [2] | Xiao, Lei (Xiao, Lei.) [3] (Scholars:肖磊) | Kan, Zhiyong (Kan, Zhiyong.) [4] | Guo, Jing (Guo, Jing.) [5] | Li, Qiang (Li, Qiang.) [6] | Jie, Wanqi (Jie, Wanqi.) [7]

Indexed by:

EI Scopus SCIE

Abstract:

Microstructure, texture, and mechanical properties of the extruded Mg-2.49Nd-1.82Gd-0.2Zn-0.2Zr alloy were investigated at different extrusion temperatures (260 and 320 degrees C), extrusion ratios (10:1, 15:1, and 30:1), and extrusion speeds (3 and 6 mm/s). The experimental results exhibited that the grain sizes after extrusion were much finer than that of the homogenized alloy, and the second phase showed streamline distribution along the extrusion direction (ED). With extrusion temperature increased from 260 to 320 degrees C, the microstructure, texture, and mechanical properties of alloys changed slightly. The dynamic recrystallization (DRX) degree and grain sizes enhanced as the extrusion ratio increased from 10:1 to 30:1, and the strength gradually decreased but elongation (EL) increased. With the extrusion speed increased from 3 to 6 mm/s, the grain sizes and DRX degree increased significantly, and the samples presented the typical <2111>-<1123> rare-earth (RE) textures. The alloy extruded at 260 degrees C with extrusion ratio of 10:1 and extrusion speed of 3 mm/s showed the tensile yield strength (TYS) of 213 MPa and EL of 30.6%. After quantitatively analyzing the contribution of strengthening mechanisms, it was found that the grain boundary strengthening and dislocation strengthening played major roles among strengthening contributions. These results provide some guidelines for enlarging the industrial application of extruded Mg-RE alloy.

Keyword:

extrusion ratio extrusion speed extrusion temperature Mg-rare earth alloys strengthening mechanisms

Community:

  • [ 1 ] [Zhang, Chenjin]Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
  • [ 2 ] [Yang, Guangyu]Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
  • [ 3 ] [Kan, Zhiyong]Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
  • [ 4 ] [Guo, Jing]Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
  • [ 5 ] [Jie, Wanqi]Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
  • [ 6 ] [Xiao, Lei]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China
  • [ 7 ] [Li, Qiang]Qujing Normal Univ, Coll Chem & Environm Sci, Qujing 655011, Peoples R China

Reprint 's Address:

  • [Yang, Guangyu]Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

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Source :

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS

ISSN: 1674-4799

Year: 2025

Issue: 1

Volume: 32

Page: 136-146

5 . 6 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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