Details

Autor(en) / Beteiligte

• Jiang, P.F.
• Li, X.R.
• Zong, X.M.
• Wang, X.B.
• Chen, Z.K.
• Yang, H.X.
• Liu, C.Z.
• Gao, N.K.
• Zhang, Z.H.

Titel

Multi-wire arc additive manufacturing of Ti basic heterogeneous alloy: Effect of deposition current on the microstructure, mechanical property and corrosion-resistance

Ist Teil von

• Journal of alloys and compounds, 2022-11, Vol.920, p.166056, Article 166056

Ort / Verlag

Lausanne: Elsevier BV

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Deposition current during fabrication plays an important role in the microstructure and properties of titanium alloy components prepared by multi-wire arc additive manufacturing (MWAAM) technology. In this study, Ti basic heterogeneous alloy with Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (TC11) as the main component was deposited using the MWAAM method with the deposition current ranging from 360 A to 400 A. The effects of deposition current on the microstructural evolution, mechanical and corrosion properties of the MWAAM titanium alloys were investigated, and the process-microstructure-property relationship was analyzed. The results show that the microstructure of as-received Ti basic heterogeneous alloy was mainly composed of lamellar primary α phase (αP) and transformed β phase (βT), and increasing the deposition current during the MWAAM process would result in the increased width of α phase and the decreased aspect ratio of α phase. The mechanical properties of MWAAM-deposited specimens decrease with increasing current, which means that phase composition played a dominant role in determining hardness. When increasing the deposition current during the MWAAM process the ultimate tensile strength (UTS) decreased from 843.75 to 804.38 MPa. The MWAAM-deposited Ti basic heterogeneous alloy featured excellent corrosion properties, the corrosion potential of the best specimen was − 311 mV SCE and the corrosion current density was 1.23 × 10−8 Acm−2. This study provides a better understanding of the effect of deposition current on the targeted deposition property in the MWAAM process, which will contribute to future process control, improvement and optimization.