Prakt. Met. Sonderband 52 (2018) 169 
[NE Scham. 
5 Per 3.2. Influence of chemical composition 
are Vis 
0) the Mater EDX investigations in the vicinity of the Vickers hardness indent show micro-segregations 
Yan (11:  ofiron and manganese (Figure 6a and 6b), which are commonly present in casted materials 
Abe [16 sl” [11,12] and a homogeneous distribution of carbon (Figure 6c). 
inf, and The schematic deformation structures shown in Figure 2d are added into Figure 6a-c. It is 
ee Ss apparent from a comparison of Figure 6 and Figure 2 that there is no change in the 
Bef deformation structures due to segregation. This leads to the conclusion that the 
a Surfs segregations of iron and manganese have no influence on the deformation mechanism. 
angle). The 
1 Can be oy 
"ON Struchure 
MAT 
2 by dislocafior 
1! borientaor 
(a) (b) (C) 
Figure 6: The elemental distribution of (a) iron and (b) manganese shows segregations but 
does not reveal any changes related with the deformation around the hardness indent, and 
(c) carbon is homogeneously distributed. 
4. SUMMARY AND OUTLOOK 
Deformation structures around a Vickers hardness indent in a grain with an orientation close 
to (101) were investigated by means of SEM, EBSD and EDX. From the performed analyses 
the following major conclusions can be drawn: 
of indent and 
ines ranging . The SEM investigation revealed sets of parallel deformation lines, which intersect 
each other and form surface steps. It was shown that the governing deformation 
mechanism in a grain closely oriented to (101) is dislocation slip and that the 
deformation structure is formed along the (211)- and (011)-directions. 
An influence of the segregation of iron and manganese on the observed deformation 
mechanism was not found. 
To acquire a deeper understanding of the deformation of the used austenitic Mn-steel, 
further hardness indents into grains with (001)- and (111)-orientation are needed. 
Particularly, as the Schmid factor for twinning in the (001)-orientation is higher than for slip. 
21 oriented 
‚direction and 
1}-plane; 
stura Dattem.