Deformed Microstructure and Hardness of Hadfield High Manganese Steel

Abstract

The distribution of micro/nano-indentation hardness and microstructures of deformed Hadfield high manganese steel have been investigated by means of micro/nano-indentation tests, and optical and electron microscopic observations. Indentation tests demonstrated that there exists a very non-uniform distribution of hardness, with a hardness variation of $30% in different grains and in different regions of the same grain. Microscopic observations indicated that the large non-uniformity of micro/nano-hardness is caused mainly by the underlying nonhomogeneous substructures (twins, dislocations, etc.), which are closely associated with the non-uniform work hardening in the deformed Hadfield steel, while the effects of the austenite grain boundary and the grain orientation of the indentation plane are not significant.

Crack propagation behavior of solution annealed austenitic high interstitial steels

“…Srain induced c ? e transformation, twinning and dislocation cells were reported [21][22][23]. The phase transformation c ?…”

Development of ferro-alloy hardfacing for high abrasion and low impact wear applications

“…The hardness value of the non-deformed heat-treated Hadfield steel falls within 215 -230 HV [33], which is lower than the hardness of samples 1 and 2. However, the selection of the hardfacing composition was based on the hardness, wear resistance, impact energy and cost of the alloying materials, as shown in Table 2.…”

Prominence of Hadfield Steel in Mining and Minerals Industries: A Review

“…Another railway crossing with composition 1.2 %C, 12.4 %Mn, 0.60 %Si, 0.016 %S, 0.022 %P and the balance Fe, which was subjected to about 160 million tonne transportation load with a combination of repeated rolling compression and impact forces from train wheels was solution treated and water quenched with the resulting mechanical properties as follow: percentage elongation -35.8 %, percentage reduction in area -22.9 %, ultimate tensile strength -840 MPa, impact toughness -320 J/cm 2 , and hardness -225 HV; the average hardness of the deformed steel ranges from 520 to 580 HV [23].…”