scholarly journals INFLUENCE OF RARE-EARTH ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HIGH MANGANESE STEEL UNDER IMPACT LOAD

2019 ◽  
Vol 25 (3) ◽  
pp. 158
Author(s):  
Nam Duong Nguyen ◽  
Nguyen Duong Nguyen ◽  
Khanh Mai Pham
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Impact Strength ◽  
Impact Load ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
Microstructure And Mechanical Properties ◽  
The Impact ◽  
Better Than

<span class="fontstyle0">In this paper, the influence of rare earth (RE) on the microstructure and mechanical properties of austenitic high manganese steel (HMnS) Mn15Cr2V were investigated. The results showed that the microstructure, hardness and impact strength of RE modification sample is finer and better than non-modified sample. Under the effect of impact load, the hardness and the depth of the work-hardening layer of the modified steel was higher than that of the non-modified steel, thereby, the value of microhardness in the surface of the modified sample was 420 HV while it was only 395 HV in the non-modified sample. The value of the impact strength of the modified sample was up to 132J/cm</span><span class="fontstyle0">2 </span><span class="fontstyle0">compared to the non-modified sample is only 115J/cm</span><span class="fontstyle0">2</span><span class="fontstyle0">. Moreover, after impact load, the austenite nanoparticles had been found out on the surface of this steel, this is the cause of the increasing of mechanical properties in this steel.</span> <br /><br />

Effects of Chromium Content and Impact Load on Microstructures and Properties of High Manganese Steel

2014 ◽  
Vol 804 ◽  
pp. 297-300
Author(s):  
Pham Mai Khanh ◽  
Nguyen Duong Nam ◽  
Le Thi Chieu ◽  
Hoang Thi Ngoc Quyen
Keyword(s):  
Transition Layer ◽  
Chromium Content ◽  
Impact Load ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
Microstructure And Properties ◽  
Cr Content ◽  
The Impact

In this paper, the effects of Cr content and impact load on the microstructure and properties of High Manganese Steel (HMS) were investigated. The results show that the hardness of HMS was increasing when the Cr content increased, but the hardness was not much changing when the Cr contents changed from 2% to 2,5% of weight. Under the impact load, the microstructure and the hardness were changed also. The Cr content effected on the depth of transition layer on surface under the impact load and the twinning occurred during impacting load.

scholarly journals Microstructure and Mechanical Properties of Gas Tungsten Arc Welded High Manganese Steel Sheet

Metals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1167 ◽  
Author(s):  
Geon-Woo Park ◽  
Haeju Jo ◽  
Minha Park ◽  
Sunmi Shin ◽  
Won-Seok Ko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Base Metal ◽  
Steel Sheet ◽  
Weld Zone ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
Gas Tungsten Arc ◽  
Microstructure And Mechanical Properties

This study investigated microstructure and mechanical properties of high manganese steel sheet fabricated by gas tungsten arc welding (GTAW). The weld zone showed longitudinal coarse grains due to the coalescence of columnar dendrites grown into the direction of heat source, and the HAZ showed equiaxed coarser grains than the base metal due to the thermal effect of GTAW process. Mn segregation occurred in the inter-dendritic regions of the weld zone and Mn depletion thus occurred in the weld matrix. Although the stacking fault energy is expected to be lowered due to the Mn depletion, no noticeable change in the initial phase and deformation mechanism was found in the weld matrix. Lower hardness and strength were shown in the weld zone than the base metal, which was caused by the coarser grain size. The negative strain rate sensitivity observed in the weld zone and the base metal is considered to have originated from the negative strain rate dependency of twinning nucleation stress.

Effect of WC and Co on the Microstructure and Properties of TiC Steel-Bonded Carbide

2017 ◽  
Vol 898 ◽  
pp. 1468-1477 ◽  
Author(s):  
Hong Wei Li ◽  
Guo Ping Li ◽  
Wen Chen ◽  
Li Hui Sun ◽  
Feng Hua Luo ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Production Cost ◽  
Manganese Steel ◽  
Powder Metallurgy Method ◽  
Cobalt Powder ◽  
Metallic Binder ◽  
High Manganese ◽  
High Manganese Steel ◽  
Ceramic Phase ◽  
The Impact

TiC base high manganese steel-bonded carbide was manufactured with conventional powder metallurgy method to service in wear and impact resistant condition. WC was added in the alloy in the form of (W,Ti)C carbides to improve the impact toughness and expand the applications of alloy, meanwhile, cobalt powder was also used to enhance the wettability of the metallic binder on the ceramic phase. Results showed that the impact toughness of the alloy was increased remarkably with the increase of WC content. The impact toughness reached 10.6 J/cm2 when WC content was 10.5 wt.%, while the hardness of the alloy did not decrease. It was indicated that the appropriate content of WC and cobalt can improve impact toughness and wear resistance of the alloy greatly with little increase in the production cost.

scholarly journals A Study on Fiber Laser Welding of High-Manganese Steel for Cryogenic Tanks

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1536
Author(s):  
Jaewoong Kim ◽  
Jisun Kim ◽  
Changmin Pyo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Laser Welding ◽  
Base Material ◽  
Manganese Steel ◽  
High Manganese ◽  
Fiber Laser Welding ◽  
High Manganese Steel ◽  
Welding Part

As the environmental regulations on ship emissions by the International Maritime Organization (IMO) become stricter, the demand for a ship powered by liquefied natural gas (LNG) is rapidly increasing worldwide. Compared to other materials, high-manganese steel has the advantages of superior impact toughness at cryogenic temperatures, a low thermal expansion coefficient, and a low-cost base material and welding rod. However, there is a limitation that the mechanical properties of a filler material are worse than those of a base material that has excellent mechanical properties. To solve these shortcomings, a basic study was performed to apply fiber laser welding with little welding deformation and no filler material to high-manganese steel. The relationship between laser welding parameters and penetration shapes was confirmed through cross-section observation and analysis by performing a bead on plate (BOP) test by changing laser power and welding speed, which are the main parameters of laser welding. In addition, the welding performance was evaluated through mechanical property tests (yield strength, tensile strength, hardness, cryogenic impact strength) of a welding part after performing the high-manganese steel laser butt welding experiment. As a result, it was confirmed that the yield strength of a high-manganese steel laser welding part was 97.5% of that of a base metal, and its tensile strength was 93.5% of that of a base metal.

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