Study of the formation of gouging pits in Mn₇Cr₂ steel under impact abrasive wear conditions

Abstract

A study of the formation of gouging pits in Mn7CrZ steel zinder impact abrasizie wear conditions was conducted using theories of elastic impact and contact, analysis of photoelasticity, and scanning electron microscopy (SEM). The results show that the maximum shear stress occurs at z = 0.48~1, and this initiates a crack; the crack propagates at an angle of 45" from the horizontal; and the gouging pit is conical. The SEM observations are in agreement with the theoretical calculations.

Effect of Mn Content on Microstructure and Mechanical Properties of Fe–Mn–Cr–C High‐Manganese Steels Produced Using Laser‐Directed Energy Deposition

“…The zigzag laser tool path was chosen because it allowed continuous LDED for each layer deposition, and the 90°scanning tilt could effectively reduce in-plane anisotropy. [9,24] In addition, overlapping tracks with a pitch of 0.5 mm were applied during the deposition of each layer. Specimens were prepared by depositing 40 Â 80 mm HMnS powder on a GCD-600 substrate with dimensions of 95 Â 130 Â 20 mm.…”

“…Also, research on materials containing alloying elements is actively being conducted to achieve even higher toughness. [9][10][11] Under applied loading, the hardening mechanism in conventionally hot-rolled and annealed HMnS containing 15-32 wt% Mn is due to transformation-induced plasticity (TRIP) such as γ-austenite ! ε-martensite !…”

Laser Rescanning for Enhancing Mechanical Properties of Laser-Directed Energy-Deposited High-Manganese Steels

“…High-manganese steel (HMnS) is an alloy comprising 3-27 wt.% of manganese and has excellent mechanical properties, such as high strength, wear resistance, high formability, and toughness. Low-carbon, high-manganese steel containing 15-30 wt.% of manganese has excellent formability and excellent wear resistance due to high work-hardenability [9,10]. However, several difficulties related to the application of HMnS in various industries still exist because of disadvantages, such as segregation due to high manganese content, limited processability, and low formability at high temperatures.…”