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#1Harpreet Singh Arora (Shiv Nadar University)H-Index: 14
#2S. Pradhan (Shiv Nadar University)
Last. Harpreet Singh Grewal (Shiv Nadar University)H-Index: 14
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Abstract Here, an excellent cavitation erosion-corrosion resistance of stainless steel using a novel severe surface deformation technique, reciprocating friction processing (RFP) was demonstrated. The RFP treated stainless steel showed nano-grained, nano-twinned microstructure along with high dislocation density. The RFP treated steel significantly surpassed the performance of advanced structural materials including high entropy alloy (Al0.1CoCrFeNi) and complex concentrated alloy (SiC reinforce...
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#1Anatoly M. BragovH-Index: 13
#2Leonid A. IgumnovH-Index: 6
Last. Victor A. Eremeyev (GUT: Gdańsk University of Technology)H-Index: 34
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Abstract The paper presents the results of studying the structure and wear resistance of compacts produced from fine dispersed reduced iron powder (average particle size 3- 5 μ m) with the addition of tungsten carbide (WC) nanopowder with the average particle size of 25-30 nm. The mass fraction of tungsten carbide (wolfram carbide) in the powder composition was 5% and 10% of the total mass. Impulse pressing was conducted using the modified Kolsky method at compacting temperatures of 20°C to 300°...
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Abstract The tribological behavior of austempered ductile iron (ADI) obtained at different austempering temperatures is investigated. The microstructure of ADI is consisted of spheroidal graphite, retained austenite and acicular ferrite. The volume fraction of retained austenite and the thickness of acicular ferrite increase with increasing austempering temperature, which results in strength reduction but plasticity increasement. With the increase of austempering temperature, the friction coeffi...
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#1Yueying Zhu (HIT: Harbin Institute of Technology)
#2Huajie Qu (HIT: Harbin Institute of Technology)
Last. Jianjun Qu (HIT: Harbin Institute of Technology)H-Index: 6
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Abstract According to the design requirement of friction pairs in MicroElectroMechanical Systems (MEMS), four kinds of hard coatings TiN, TiCN, AlTiN and diamond like carbon (DLC) were selected to form 16 kinds of combinations. The tribological characteristics of the 16 kinds of combinations were investigated by using ball-on-disc tester. The wear mechanisms of the coating combinations were analyzed by scanning electron microscopy (SEM), Energy-dispersive spectroscopy (EDS) and Raman spectroscop...
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#1Chun-peng Liu (Dalian Jiaotong University)H-Index: 2
#2Jinzhi Pan (Dalian Jiaotong University)H-Index: 2
Last. Xiujuan Zhao (Dalian Jiaotong University)H-Index: 4
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Abstract In this work, the influence of different original microstructure on the rolling contact fatigue (RCF) property of D2 wheel steel under oil lubrication condition is thoroughly studied by the GPM-30 rolling fatigue tester. Before pre-wear, the RCF life of the tempered sorbite (TS) sample and the lamellar pearlite + proeutectoid ferrite (P + F) sample are 7.2 × 105cycles and 5.4 × 105 cycle, respectively. After pre-wear, the RCF life of the TS sample is 4 times higher than that of the orig...
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#1Yushan Geng (CAS: Chinese Academy of Sciences)
#2Jiao Chen (CAS: Chinese Academy of Sciences)H-Index: 4
Last. Weimin Liu (CAS: Chinese Academy of Sciences)H-Index: 66
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Abstract High entropy alloys (HEAs) are an important candidate for high temperature mechanical systems. Here, effects of atmosphere, temperature and counterparts on the vacuum tribological behaviors of CoCrFeNi HEA fabricated by spark plasma sintering were systematically studied. Comparison of tribological behaviors in vacuum and air indicated that tribo-oxidation is detrimental to the wear resistance of CoCrFeNi HEA within temperature range 25 - 400 °C, but positive at 600 and 800 °C. The CoCrF...
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#2J. Marteau (CNRS: Centre national de la recherche scientifique)
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Abstract This study focused on the comparison of the microstructure changes induced in two pearlitic rail steels subjected to full-scale wheel-rail contact rig tests (DB Systemtechnik, Germany): a conventional R260 steel grade and a heat-treated premium R370CrHT rail grade (also known as MHH400). The total loading of the wheel/rail contact rig test was computed to be 2.4 million gross tons but aimed at reproducing large deformations caused by loadings around 100 million gross tons into the mater...
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#1Themistoklis Melissaris (TU Delft: Delft University of Technology)H-Index: 2
#1Themistoklis Melissaris (TU Delft: Delft University of Technology)
Last. Tom van Terwisga (Maritime Research Institute Netherlands)H-Index: 5
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Abstract Predicting the cavitation impact loads on a propeller surface using numerical tools is becoming essential, as the demand for more efficient designs, stretched to the limit, is increasing. One of the possible design limits is governed by cavitation erosion. The accuracy of estimating such loads, using a URANS approach, has been investigated. We follow the energy balance approach by (Schenke and van Terwisga, 2019), (Schenke et al., 2019), where we take account of the focusing of the pote...
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#1Oskari Haiko (University of Oulu)H-Index: 4
#2P. Kaikkonen (University of Oulu)H-Index: 1
Last. Jukka Kömi (University of Oulu)H-Index: 8
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Abstract This study encompasses a comprehensive account of the abrasive wear properties of carbide-free, ultrahigh-strength bainitic steels processed through ausforming at three different temperatures well below the recrystallization stop temperature followed by bainitic transformation at temperatures close to the Ms temperature. Five medium-carbon, high-silicon compositions were designed for the study by suitably varying the alloying levels of carbon, vanadium, niobium, molybdenum, and aluminum...
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#1Baochao Zheng (JNU: Jinan University)H-Index: 3
#2Jiandong Xing (Xi'an Jiaotong University)H-Index: 29
Last. Yongxin Jian (Xi'an Jiaotong University)H-Index: 8
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Abstract An as-cast chromium white cast iron alloy with chromium (Cr) content of 0 wt%, 1 wt%, 2 wt%, 3 wt%, and 4 wt% was prepared via metallurgical smelting and casting processes. The effects of Cr content on the toughness, hardness, and microstructure of (Fe, Cr)3C carbides was evaluated. The results revealed that the microstructure of the as-cast alloys is mainly composed of bulk carbide and the pearlite matrix. The carbide in the alloy without added Cr, i.e., eutectic Fe3C, was characterize...
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