Effect of Fe addition on properties of Ti–6Al-xFe manufactured by blended elemental process

Sjafrizal，Teddy1,2; Dehghan-Manshadi，Ali1; Kent，Damon1,3; Yan，Ming4; Dargusch，Matthew S.1

2020-02-01

10.1016/j.jmbbm.2019.103518

Journal of the Mechanical Behavior of Biomedical Materials   影响因子和分区

1751-6161

1878-0180

The mechanical properties of titanium alloys produced by powder metallurgy (PM) are dependent on the amount of porosity within the fabricated component. The space between powder particles and the behaviour of alloying elements during sintering contribute to the formation of pores. Iron (Fe) is well known to be a cost-effective alloying element for titanium alloys which acts to stabilise the β-phase. This study aims to investigate the effects of Fe addition on the sintering response of titanium alloys containing aluminium. Ti–6Al-xFe(x = 1, 3, and 5 wt %) alloy systems were manufactured by press and sinter PM from blended-elemental powders. The density, mechanical properties, microstructures and pore distribution in the sintered parts were evaluated. The compressive strength of the alloys was positively correlated to the levels of Fe. Grain boundary and solid solution strengthening accounted for the strength improvements. Furthermore, Ti–6Al–3Fe exhibited the highest strength/modulus ratio. Evaluation of the pore distributions revealed that the number of fine pores was reduced significantly as the amount of Fe was increased, though concomitantly the number of larger pores increased. It is argued that the increasing number of larger pores with higher levels of Fe is due to coalescence of fine Kirkendall porosity during the latter stages of sintering. With excessive iron additions, large pores counteract any beneficial impacts on the sintering response. It is suggested to limit the amount of Fe additions to around 3 wt% to reduce adverse effects from large pores and to maximise the strength/modulus ratio.

Mechanical properties Microstructure Phase stability Powder metallurgy Titanium alloy

EI ; SCI

英语

其他

Tree Research and Education Endowment Fund[] ; [IH150100024]

Engineering ; Materials Science

Engineering, Biomedical ; Materials Science, Biomaterials

WOS:000512220000044

Elsevier Ltd

20194607691760

Alloying ; Alloying elements ; Compressive strength ; Cost effectiveness ; Density (specific gravity) ; Grain boundaries ; Iron ; Mechanical properties ; Microstructure ; Phase stability ; Porosity ; Powder metallurgy ; Sintering

Metallurgy:531.1 ; Titanium and Alloys:542.3 ; Iron:545.1 ; Industrial Economics:911.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

2-s2.0-85074895988

Scopus

1.Centre for Advanced Materials Processing and Manufacturing,School of Mechanical and Mining Engineering,The University of Queensland,St Lucia,4072,Australia
2.Industrial Engineering Department,School of Industrial Engineering,Telkom University,Bandung,40257,Indonesia
3.School of Science and Engineering,University of the Sunshine Coast,Maroochydore DC,4558,Australia
4.Department of Materials Science and Engineering,Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials,Southern University of Science and Technology,Shenzhen,518055,China

Sjafrizal，Teddy,Dehghan-Manshadi，Ali,Kent，Damon,等. Effect of Fe addition on properties of Ti–6Al-xFe manufactured by blended elemental process[J]. Journal of the Mechanical Behavior of Biomedical Materials,2020,102.

Sjafrizal，Teddy,Dehghan-Manshadi，Ali,Kent，Damon,Yan，Ming,&Dargusch，Matthew S..(2020).Effect of Fe addition on properties of Ti–6Al-xFe manufactured by blended elemental process.Journal of the Mechanical Behavior of Biomedical Materials,102.

Sjafrizal，Teddy,et al."Effect of Fe addition on properties of Ti–6Al-xFe manufactured by blended elemental process".Journal of the Mechanical Behavior of Biomedical Materials 102(2020).