Effect of pore sizes and cholesterol-lipid solution on the fracture toughness of pure titanium sintered compacts

Teoh, Swee Hin; Thampuran, R.; Seah, W.K.H.; Goh, James Cho‐Hong

doi:10.1016/0142-9612(93)90142-o

Cited by 19 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As in Ref. [16], the fracture toughness was calculated by K IC = √( J IC ⋅ E′ ) with E’ = E/ (1 – ν 2 ) and ν = 0.3 being the Poisson ratio. Corresponding data for the relative density 0.65, used in Ref.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…The main data are the normalized fracture toughness and corresponding errors (if available in the references) as a function of the normalized porosity. These data are carefully extracted graphically from figures in the given references [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17]. Errors of a few percent like 1%–5% are possible, but they should be mostly below 2%.…”

Section: Datamentioning

confidence: 99%

“…densityE [GPa]J IC [kJ/m 2 ]K IC [MPa√m]Kashef et al [15]and Teoh et al. [16](titanium)0.3011.01.340.4017.62.470.6544.78.018.951.001162555.5McCullough et al[17] (Al-alloy)0.131.140.390.6680.171.770.551.010.171.860.601.030.212.540.881.490.274.051.142.160.274.441.302.410.294.601.352.500.294.721.552.720.325.591.552.96(model C, open p.)170*26**44.7***(model A, closed p.)170*23**42.1***

Fig. 1Overview of the measured normalized fracture toughness of different ceramic and polymer materials.…”

Section: Datamentioning

confidence: 99%

See 2 more Smart Citations

Fracture toughness of porous materials – Experimental methods and data

Jelitto

Schneider

2019

Data in Brief

View full text Add to dashboard Cite

We provide numerical experimental data and detailed information about the sample preparation and the experimental methods, used by different research groups for measuring the fracture toughness of porous materials. These data are supplemental information to the publication “A Geometric Model for the Fracture Toughness of Porous Materials,” [1], which is based on experimental data of ceramic and polymer materials. For the sake of completeness, we provide here also data from fracturing metallic foams. The corresponding theoretical curves, which are based on the model described in the reference, are given additionally in the diagrams. The utilized publications are not a comprehensive compilation of all corresponding measurements concerning porous materials, but should be seen as a typical set of respective experiments with the focus on the fracture toughness of porous materials. The discussion and interpretation are provided in the above-mentioned reference.

show abstract

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Fig. 1Overview of the measured normalized fracture toughness of different ceramic and polymer materials.…”

Section: Datamentioning

confidence: 99%

See 1 more Smart Citation

Fracture toughness of porous materials – Experimental methods and data

Jelitto

Schneider

2019

Data in Brief

View full text Add to dashboard Cite

show abstract

“…Hence, the reduction in the fracture toughness with an increase in strength for various materials, as reported in the literature [29] is ultimately connected to the fracture strain at the tip of the crack. In PM alloys, fracture toughness measurements indicate [30,31] that with an increase in porosity, both fracture toughness and tensile strength decrease because there is less material to support the stress at higher porosity levels. If we follow this correlation, one would have to conclude that in porous materials, fracture toughness increases with an increase in tensile strength, which is contrary to the trend in wrought materials.…”

Section: Discussionmentioning

confidence: 97%

The Nature of Tensile Ductility as Controlled by Extreme-Sized Pores in Powder Metallurgy Ti-6Al-4V Alloy

Kumar

Chandran

Cao

et al. 2016

Metall Mater Trans A

View full text Add to dashboard Cite

Tensile properties of Ti-6Al-4V titanium alloy, sintered by a new process (sintering, phase transformation, and dehydrogenation of titanium hydride compacts, termed HSPT process), were investigated to determine how the sintering pores influence the tensile strength and ductility. It was found that the ductility in the sintered alloy is severely affected by the size of the largest pore, referred here as extreme-sized pore, even when the average volume fraction of porosity is nearly constant between a large number of samples. It is shown that the rapid decrease in ductility, with an increase in the extreme pore size, is caused by strain localization around the extreme-sized pore and early crack initiation. This crack initiation leads to fracture of the plane containing the pore thereby limiting the extent of uniform plastic strain that can be attained before fracture. Interestingly, the strength properties are, however, found to be independent of the size of the extreme-sized pore. The results are explained on the basis of stress concentration and strain localization around the extreme-sized pores. The work also reveals that if the extreme-sized pores are eliminated, PM Ti-6Al-4V alloy with high strength (~1100 MPa) and good ductility (~12 pct), which is easily comparable to a wrought Ti-6Al-4V alloy, can be achieved even at oxygen levels up to 0.4 wt pct.

show abstract

“…Typical examples of isolated and interconnected pore morphologies were reported in a previous paper [3]. …”

Section: Compaction and Densificationmentioning

confidence: 88%

Parametric studies of the mechanical behaviour of porous titanium

Seah¹,

Thampuran

Teoh³

1998

Metals and Materials

Self Cite

View full text Add to dashboard Cite

This paper investigates the prediction of some common mechanical properties of sintered pure titanium. Tensile strength was determined using the radial crush strength method and the fracture toughness tests were performed using disk-shaped compact tension specimens. Empirical models that predict the mechanical behaviour of sintered titanium are reported in this paper and compared with other models like those of HashinStrikman, Fleck and Smith, Griffiths et al. and Nielson.

show abstract

Effect of pore sizes and cholesterol-lipid solution on the fracture toughness of pure titanium sintered compacts

Cited by 19 publications

References 9 publications

Fracture toughness of porous materials – Experimental methods and data

Fracture toughness of porous materials – Experimental methods and data

The Nature of Tensile Ductility as Controlled by Extreme-Sized Pores in Powder Metallurgy Ti-6Al-4V Alloy

Parametric studies of the mechanical behaviour of porous titanium

Contact Info

Product

Resources

About