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Materials Science A / Materiaalkunde A - 214

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Which mixed-mode fracture features were present at the central core of the shaft? (More than one answer is allowed.)

Watter gemenge wyse van breukkenmerke het by die middelkern van die as voorgekom? (Meer as een antwoord word toegelaat.)

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Considering the typical loading conditions for the automobile axle shaft, which mode of loading is most relevant to this scenario?

Gegee die tipiese belastingstoestande vir 'n outomobiel wieldryfas hieronder, watter mode van belasting is die meeste van toepassing by hierdie geval?

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Choose the right term from the drop-down list. / Kies die regte term uit die aftreklys.

 

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Study the micrograph for a steel with 1 wt% C. Match the phases that occur to their location descriptions. / Bestudeer die mikrograaf vir 'n staal met 1 gew.% C. Pas die fases wat voorkom by hul ligging beskrywings.

1 wt% C steel

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Choose the most accurate description of the microstructural features of the eutectoid steel shown in the micrograph. / Kies die mees akkuraat beskrywing van die mikrostruktuur kenmerke van die eutektoïede staal wat in die mikrograaf getoon is. 

Eutectoid steel micrograph

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Match the following micrographs with the correct type of microscope and relative magnification used to identify the microstructure. Hint: look at the scale bar. As a further hint, the name given to the type of microstructure is also provided along with the micrograph. Final hint: a higher magnification means that the image is more "zoomed in". 

Pas die volgende mikrograwe by die korrekte tipe mikroskoop en relatiewe vergroting wat gebruik word om die mikrostruktuur te identifiseer. Wenk: kyk na die skaalbalk. As 'n verdere wenk word die naam wat aan die tipe mikrostruktuur gegee word ook saam met die mikrograaf verskaf. Laaste wenk: 'n hoër vergroting beteken dat die prent meer "ingesoem" is.

Afrikaans vertaling vir die verskillende opsies:

  • Scanning electron microscope + higher magnification / Skandeerelektronmikroskoop + hoër vergroting
  • Scanning electron microscope + lower magnification / Skandeerelektronmikroskoop + laer vergroting
  • Optical microscope + higher magnification / Optiese mikroskoop + hoër vergroting
  • Optical microscope + lower magnification / Optiese mikroskoop + laer vergroting
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Study the micrograph for a steel with 1 wt% C. Match the phases that occur to their location descriptions. / Bestudeer die mikrograaf vir 'n staal met 1 gew.% C. Pas die fases wat voorkom by hul ligging beskrywings.

1 wt% C steel

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Pearlite is not a phase; it is a microstructure that is formed by alternating layers of ferrite and cementite phases. / Perliet is nie 'n fase nie; dit is 'n mikrostruktuur wat gevorm word deur afwisselende lae van ferriet- en sementiet fases.

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