Grain boundaries can be observed when viewing a polished metal under a microscope as they are lower energy areas of the metal and adsorb more of the light from the microscope. / Korrelgrense kan waargeneem word wanneer 'n gepoleerde metaal onder 'n mikroskoop bekyk word, aangesien dit gebiede van laer energie van die metaal is en meer van die lig van die miksroskoop absorbeer.

Match the goal of each preparation step to its name:

/ Pas die doel van elke voorbereiding stap by sy naam:

For the Continuous-Cooling Transformation diagram below, select the correct statement:

Vir die Deurlopende-Verkoelingstransformasie diagram hieronder, kies die korrekte stelling:

A small specimen has been subjected to the following time–temperature treatment. Assume that the specimen begins at 760°C (1400°F) and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. The specimen has been cool rapidly to 400°C (750°F), held for 20 s, then quenched to room temperature. What is the nature of the final microstructure?

'n Klein monster is aan die volgende tyd-temperatuurbehandeling onderwerp. Aanvaar dat die monster begin by 760°C (1400°F) en dat dit lank genoeg by hierdie temperatuur gehou is om 'n volledige en homogene austenitiese struktuur te verkry. Die monster is vinnig afgekoel tot 400°C (750°F), daar gehou vir 20 sekondes en daarna tot kamertemperatuur geblus. Wat is die aard van die finale mikrostruktuur?

For the continuous cooling transformation diagram shown before: by looking only at the different phases on this diagram, what type of alloy can this be classified as?

Vir die deurlopende verkoelingstransformasiediagram wat voorheen getoon is: deur slegs na die verskillende fases op hierdie diagram te kyk, as watter tipe allooi kan dit geklassifiseer word?

Refer to the continuous cooling transformation diagram below. Match the regions indicated by a, b, c, d and e with the correct microstructural product(s). 

Verwys na die deurlopende verkoelingstransformasiediagram hieronder. Pas die gebiede aangedui deur a, b, c, d en e met die korrekte mikrostrukturele produk(te). 

For the continuous cooling transformation diagram shown before, which of the following cooling rates will form 100% martensite?

Vir die deurlopende verkoelingstransformasiediagram wat voorheen getoon is, watter van die volgende verkoelingstempo's sal 100% martensiet vorm?

Phase formed from a diffusionless reaction:

Fase wat deur 'n diffusielose reaksie gevorm word:

For the Continuous-Cooling Transformation diagram below, select the correct statement:

Vir die Deurlopende-Verkoelingstransformasie diagram hieronder, kies die korrekte stelling:

A small specimen has been subjected to the following time–temperature treatment. Assume that the specimen begins at 760°C (1400°F) and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. The specimen has been cool rapidly to 400°C (750°F), held for 20 s, then quenched to room temperature. What is the nature of the final microstructure?

'n Klein monster is aan die volgende tyd-temperatuurbehandeling onderwerp. Aanvaar dat die monster begin by 760°C (1400°F) en dat dit lank genoeg by hierdie temperatuur gehou is om 'n volledige en homogene austenitiese struktuur te verkry. Die monster is vinnig afgekoel tot 400°C (750°F), daar gehou vir 20 sekondes en daarna tot kamertemperatuur geblus. Wat is die aard van die finale mikrostruktuur?