Details

Autor(en) / Beteiligte

• Reisinger, S.
• Ressel, G.
• Eck, S.
• Marsoner, S.

Titel

Differentiation of grain orientation with corrosive and colour etching on a granular bainitic steel

Ist Teil von

• Micron (Oxford, England : 1993), 2017-08, Vol.99, p.67-73

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •It is possible to identify the {100} crystal orientation in the investigated steel, by means of Nital and Klemm etching.•A cross section after Klemm etching showed, that bainite is also removed during colour etching and there is no removal on retained austenite.•The cross section also showed that on a {100} crystal orientation the deposit thickness is approximately 39nm and on a {110}/{111} crystal orientation 29nm.•The luminescence, which is directly affected by the deposit thickness, is around 100 for a {100} crystal orientation and approximately 120–150 for a {110}/{111} crystal orientation.•It can be confirmed that Klemm etching also allows the determination of the retained austenite content via an area counting, which agrees well with XRD measurements. This study presents a detailed verification of the etching methods with Nital and Klemm on a granular bainitic steel. It is shown that both methods allow the identification of the crystal orientation, whereas Klemm etching enables also a quantification of the apparent phases, as also retained austenite can be distinguished from the other bainitic microstructures. A combination of atom probe tomography with electron-back-scattered-diffraction showed that both etching methods emphasize the bainitic {100} crystal orientation. However, a cross-section produced by focused ion beam evidenced that Klemm etching leads to the formation of a topography of the different oriented bainitic crystals that directly affects the thickness and therefore the apparent colour of the deposited layer formed during etching.