Influence of TiCN addition on the microstructures and mechanical properties of the AZ31 alloy

Qi-Feng Li; Wei Qiu; Wen Xie; Wei-Ying Huang; Li-Bo Zhou; Yan-Jie Ren; Jian Chen; Mao-Hai Yao; Ai-Hu Xiong; Wei Chen

doi:10.1039/d2ra05280f

Influence of TiCN addition on the microstructures and mechanical properties of the AZ31 alloy

RSC Adv. 2022 Oct 26;12(47):30650-30657. doi: 10.1039/d2ra05280f. eCollection 2022 Oct 24.

Authors

Qi-Feng Li^{1

2}, Wei Qiu^{1

2}, Wen Xie^{1

2}, Wei-Ying Huang^{1

2}, Li-Bo Zhou^{1

2}, Yan-Jie Ren^{1

2}, Jian Chen^{1

2}, Mao-Hai Yao³, Ai-Hu Xiong³, Wei Chen^{1

2}

Affiliations

¹ School of Energy and Power Engineering, Changsha University of Science & Technology Changsha Hunan 410114 China [email protected] [email protected].
² Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & Technology Changsha Hunan 410114 China.
³ Hunan Rare Earth Metal Material Research Institute, Institute of Rare Earth Light Alloys Changsha 410126 China.

Abstract

The microstructure and mechanical properties of extruded AZ31 + xTiCN (x = 0, 0.4, 0.8, 1.2 wt%) were investigated, and the strengthening mechanism was discussed. X-ray diffraction and energy dispersive spectroscopy (EDS) confirmed that the Al₄C₃ and Al₂MgC₂ duplex phase particles were generated in situ by TiCN and Al particles, which act as the nucleation precursors of Mg grains during solidification. The grain size decreased and then increased with increasing TiCN addition. The yield strength (YS) and ultimate tensile strength (UTS) increased with increasing TiCN addition reaching a maximum (217.5 MPa) at 0.4 wt%, and in contrast, the elongation index (EI) continuously decreased with increasing TiCN addition.