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X-ray computed microtomography studies of MIM and DPR parts

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dc.contributor.author Muchavi, Noluntu S
dc.contributor.author Bam, L
dc.contributor.author De Beer, FC
dc.contributor.author Chikosha, Silethelwe
dc.contributor.author Machaka, Ronald
dc.date.accessioned 2017-08-22T13:07:39Z
dc.date.available 2017-08-22T13:07:39Z
dc.date.issued 2016-10
dc.identifier.citation Muchavi, N.S., Bam, L., De Beer, F.C. et al. 2016. X-ray computed microtomography studies of MIM and DPR parts. Journal of the Southern African Institute of Mining and Metallurgy, vol. 116(10): 973-980. doi.org/10.17159/2411-9717/2016/v116n10a13 en_US
dc.identifier.issn 2225-6253
dc.identifier.uri doi.org/10.17159/2411-9717/2016/v116n10a13.
dc.identifier.uri http://www.saimm.co.za/Journal/v116n10p973.pdf
dc.identifier.uri http://www.scielo.org.za/scielo.php?script=sci_abstract&pid=S0038-223X2016001000015
dc.identifier.uri http://hdl.handle.net/10204/9448
dc.description Journal of the Southern African Institute of Mining and Metallurgy, vol. 116(10): doi.org/10.17159/2411-9717/2016/v116n10a13 en_US
dc.description.abstract Parts manufactured through power metallurgy (PM) typically contain pores that can be detrimental to the final mechanical properties. This paper explores the merits of 3D X-ray computed tomography over traditional microscopy for the characterization of the evolution of porosity in metal injection moulding (MIM) and direct powder rolling (DPR) products. 17-4 PH stainless steel (as-moulded, as-debound and sintered) dog-bone samples produced via MIM and Ti-HDH strips (as-rolled and sintered) produced via DPR and were analysed for porosity. 3D micro-focus X-ray tomography (XCT) analysis on specimens from both processes revealed spatial variations in densities and the existence of characteristic moulding and roll compaction defects in agreement with traditional microscopic microstructural analysis. It was concluded that micro-focus XCT scanning can be used to study MIM and DPR parts for the characterization of the amount, position and distribution of porosity and other defects. However, the majority of the sub-micron sized pores could not be clearly resolved even at the highest possible instrument resolution. Higher-resolution scans such as nano-focus XCT could be utilized in order to fully study the porosity in MIM and DPR parts. en_US
dc.language.iso en en_US
dc.publisher The Southern African Institute of Mining and Metallurgy en_US
dc.relation.ispartofseries Worklist;19267
dc.relation.ispartofseries Worklist;17996
dc.subject X-ray tomography en_US
dc.subject Metal injection moulding en_US
dc.subject Direct powder rolling en_US
dc.subject 17-4 PH stainless steel en_US
dc.subject Titanium en_US
dc.title X-ray computed microtomography studies of MIM and DPR parts en_US
dc.type Article en_US


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