scholarly journals Effect of Martensite Volume Fraction on Oxidative and Adhesive Wear

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2964
Author(s):  
Yunbo Zhang ◽  
Abdeljalil Jourani
Keyword(s):  
Wear Mechanism ◽  
Dual Phase Steel ◽  
Rate Increase ◽  
Adhesive Wear ◽  
Volume Fraction ◽  
Tribological Behavior ◽  
Normal Load ◽  
Oxidative Wear ◽  
Sliding Velocity ◽  
Martensite Volume Fraction

It is generally known that microstructure can considerably affect the tribological behavior of non-lubricated rubbing. However, there is still a lack of awareness about the effect of microstructure on oxidative wear. The present study focused on the effect of martensite volume fraction (MVF) on oxidative wear by using 25CD4 dual-phase steel. Dry friction tests were performed on a ball-on-flat tribometer with a normal load of 15 N and a mean sliding velocity of 0.013 m/s. Friction coefficient and wear rate increase with the increasing MVF. SEM observation and EDXS analyses of the wear scars showed that the oxidation increases with decreasing MVF. For lower MVF, the main wear mechanism is mild oxidative wear. For higher MVF, severe adhesion is predominant as a wear mechanism. The size of the debris decreases with decreasing MVF.

Microstructural and Tribological Characterization of API X52 Dual-Phase Steel

2021 ◽  
Author(s):  
Gamri Hamza ◽  
Allaoui Omar ◽  
Zidelmel Sami
Keyword(s):  
Mechanical Properties ◽  
Dual Phase Steel ◽  
Volume Fraction ◽  
Wear Behavior ◽  
Normal Load ◽  
Great Influence ◽  
Dual Phase ◽  
Martensite Volume Fraction ◽  
Direct Quenching ◽  
Disc Configuration

Abstract The effect of the morphology and the martensite volume fraction on the microhardness, the tensile, the friction and the wear behavior of API X52 dual phase (DP) steel has been investigated. Three different heat treatments were used to develop dual phase steel with different morphologies and with different amounts of martensite: Intermediate Quenching Treatment/Water (IQ); Step Quenching Treatment (SQ) and direct quenching (DQ). Tribological tests are conducted on DP steels using a ball-on-disc configuration under normal load of 5 N and at a sliding speed of 4 cm/s were used to study the friction and wear behavior of treated samples. Results show that the ferrite–martensite morphology has a great influence on the mechanical properties of dual phase steel. The steel subjected to (IQ) treatment attain superior mechanical properties compared to the SQ and the DQ treatments. On the other hand, it is also found that the friction coefficient and the wear rate (volume loss) decrease when the hardness and the martensite volume fraction increase. The steel with fine fibrous martensite provide good wear resistance.

Influence of Neodymium on Wear Resistance of Hypereutectic Al-Si Alloy

2015 ◽  
Vol 1095 ◽  
pp. 135-139
Author(s):  
Wei Xi Shi ◽  
Cheng Wu Du ◽  
Gui Mao Li ◽  
Zhi Ming Liu
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Primary Silicon ◽  
Oxidative Wear ◽  
Initial Sample ◽  
Unmodified Alloy ◽  
Resistance Tests

The morphology of eutectic and primary silicon phases was analyzed by OM and SEM. OM and SEM results show that pure Nd can significantly refine both eutectic and primary silicon of hypereutectic Al-20%Si alloy. Morphology of primary silicon is transformed from star-shaped and irregular morphology to fine polyhedral and grain size of primary silicon is refined from 80~120 μm to 20~50 μm. Friction and wear resistance tests show that friction coefficient of Al-20%Si alloy reduces after Nd modification. Wear resistance of Al-20%Si alloy after modification is significantly improved as compared to the initial sample. The dominant wear mechanism for 0.3% Nd modified alloy is abrasive wear, adhesive wear and oxidative wear mechanism, but wear mechanism for unmodified alloy is abrasive wear and adhesive wear mechanism.

Effects of sliding velocity and normal load on tribological behavior of aged Al-Sn-Cu alloy

2016 ◽  
Vol 26 (7) ◽  
pp. 1809-1819 ◽  
Author(s):  
Sheng-cheng ZHANG ◽  
Qing-lin PAN ◽  
Jie YAN ◽  
Xing HUANG
Keyword(s):  
Tribological Behavior ◽  
Normal Load ◽  
Sliding Velocity ◽  
Cu Alloy

Micro-Tribological Behavior of Boron Carbide Self-Mated Pairs

2007 ◽  
Vol 336-338 ◽  
pp. 1740-1742
Author(s):  
Fang Wu ◽  
Sheng Ming Xu ◽  
Song Zhe Chen ◽  
Lin Yan Li ◽  
Gang Xu ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Boron Carbide ◽  
Tribological Properties ◽  
Tribological Behavior ◽  
Normal Load ◽  
The Self ◽  
Sliding Velocity ◽  
Oxidation Treatment ◽  
Sliding Distance

Tribological behavior of B4C-SiC self-mated pairs was studied, and pre-oxidation treatment was adopted to improve the tribological properties of B4C-SiC. At the same SiC content, self-friction coefficient of B4C-SiC decreases with the increase of sliding distance, normal load, and sliding velocity; while the increasing of SiC content leads to increase of both self-friction coefficient and ware rate, which was determined to be within the range of 0.8×10-6~5.8×10-6 mm3·N-1·m-1. Pre-oxidation treatment of the B4C-SiC resulted in the formation of B2O3/H3BO3 lubricant layers, which effectively reduced the self-friction coefficient.

scholarly journals Effects of Multi-Axial Compression on the Mechanical and Fretting Wear Properties of Ti-45Nb Alloys

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 454
Author(s):  
Zhuoqing Xu ◽  
Nan Hu ◽  
Yuan Lu ◽  
Xiaochang Xu
Keyword(s):  
Axial Compression ◽  
Wear Mechanism ◽  
Adhesive Wear ◽  
Stress Shielding ◽  
Fretting Wear ◽  
Shielding Effect ◽  
Oxidative Wear ◽  
Wear Properties ◽  
Fine Grained ◽  
Grain Sizes

Biocompatible β-type Ti-45Nb alloy with a low elastic modulus is promising in alleviating the stress shielding effect of Ti-based hard-tissue replacement implants. In this work, the ultra-fine-grained (UFG) microstructures with different grain sizes were prepared by multi-axial compression (MAC) processing of Ti-45Nb alloys, and the mechanical properties and the fretting wear properties of Ti-45Nb alloys in different grain sizes were investigated. The results show that the yield strength and ultimate tensile strength of the sample processed by 27 passes MAC increase by 76% and 91%, respectively, with an elongation of more than 9%. After MAC processing, the friction coefficient and volume wear rate gradually decrease. In addition, before MAC processing, the Ti-45Nb sample shows a wear mechanism of severe adhesive wear, oxidative wear and fatigue delamination; while after MAC processing, the wear mechanism switches to abrasive wear and slight adhesive wear with slight oxidative wear, indicating that grain refinement helps to improve the anti-fretting properties of Ti-45Nb alloys.

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