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Keyword: Hardness
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Journal Articles
Article Type: Research Papers
J. Tribol. December 2019, 141(12): 121601.
Paper No: TRIB-19-1177
Published Online: September 11, 2019
... publication in the J ournal of T ribology . 18 04 2019 17 08 2019 19 08 2019 05 09 2019 sliding wear elevated-temperature wear Mg–Gd–Y–Zr alloy wear mechanisms microstructure hardness dynamic recrystallization dry friction surface properties and characterization...
Journal Articles
Article Type: Research-Article
J. Tribol. August 2019, 141(8): 081601.
Paper No: TRIB-18-1401
Published Online: June 4, 2019
... that the primary Mg 2 Si particles average equivalent diameter and volume fraction are increased with an increase in Mg 2 Si (Mg and Si) concentration in the Al–Mg 2 Si composite. Therefore, the bulk hardness of the composites is increased, whereas the primary Mg 2 Si hardness decreased because the...
Journal Articles
Article Type: Research-Article
J. Tribol. May 2019, 141(5): 052003.
Paper No: TRIB-18-1091
Published Online: March 11, 2019
... and counter face, resulting in improved wear properties. The nanoclay particles also induce increased hardness and friction to the composites and improve braking properties. 1 Corresponding author. Contributed by the Tribology Division of ASME for publication in the J ournal of T ribology...
Journal Articles
Article Type: Research-Article
J. Tribol. April 2019, 141(4): 041604.
Paper No: TRIB-18-1148
Published Online: January 22, 2019
... the tribological performance of an experimental Ti−Si−Zr alloy. The effect of Al content on the alloy's microstructure and mechanical properties was evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Vickers hardness measurements. Sliding wear testing was performed in a...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2018, 140(6): 061404.
Paper No: TRIB-17-1478
Published Online: July 12, 2018
... component. As this hardening process not only generates a RS gradient in the treated component but also a hardness gradient (called over-tempered region), both types of gradients were introduced in the present model. RSs in compression were generated in the hard case (about 60 HRC); tension values were...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2018, 140(6): 061606.
Paper No: TRIB-17-1315
Published Online: May 28, 2018
.... The 3D-printed Ti64 samples had a heavily twinned and acicular martensitic structure that was responsible for their higher surface hardness than that of the commercial Ti64 samples. The 3D-printed Ti64 samples tested against a 100Cr6 steel counter ball without and with Hank's solution had a higher...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2018, 140(6): 061607.
Paper No: TRIB-18-1074
Published Online: May 28, 2018
... OF T RIBOLOGY . Manuscript received February 18, 2018; final manuscript received April 29, 2018; published online May 28, 2018. Assoc. Editor: Yi Zhu. 18 02 2018 29 04 2018 Hardness Sliding Surface properties Wear Wear mechanisms Characterization Aluminum alloys...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2018, 140(6): 061601.
Paper No: TRIB-17-1039
Published Online: May 21, 2018
... RIBOLOGY . Manuscript received January 29, 2017; final manuscript received December 21, 2017; published online May 21, 2018. Assoc. Editor: Dae-Eun Kim. 29 01 2017 21 12 2017 Cavitation Erosion Hardness Micro-tribology Surface properties Surface roughness Surface treatments...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2018, 140(6): 061602.
Paper No: TRIB-17-1226
Published Online: May 21, 2018
.... Hardness tests taken along radial direction of the composites revealed that, the inner surface had better hardness and it reduced toward outer periphery. The outer and inner surfaces of Cu/SiC were compared with Cu/Si 3 N 4 composites and results revealed that inner surface of Cu/SiC had highest wear...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2018, 140(6): 061401.
Paper No: TRIB-18-1014
Published Online: May 14, 2018
...Wei Wang; Huaiju Liu; Caichao Zhu; Philippe Bocher; Heli Liu; Zhangdong Sun Carburized gears are applied extensively in large-scale heavy duty machines such as wind turbines. The carburizing and quenching processes not only introduce variations of hardness from the case to the core but also...
Journal Articles
Article Type: Research-Article
J. Tribol. September 2018, 140(5): 051605.
Paper No: TRIB-17-1201
Published Online: April 10, 2018
...Kyungjun Lee; Wei Dai; Donald Naugle; Hong Liang The current design of materials against wear considers hardness as the sole material property. As a result, the brittleness associated with increased hardness leads to severe damage. The purpose of this research is to understand the nature of...
Includes: Supplementary data
Journal Articles
Article Type: Research-Article
J. Tribol. September 2018, 140(5): 051603.
Paper No: TRIB-17-1463
Published Online: April 3, 2018
... in the J OURNAL OF T RIBOLOGY . Manuscript received November 30, 2017; final manuscript received February 6, 2018; published online April 3, 2018. Assoc. Editor: Sinan Muftu. 30 11 2017 06 02 2018 Coatings Hardness Wear 5CrNiMo steel has been widely used in hot forging...
Journal Articles
Article Type: Research-Article
J. Tribol. May 2018, 140(3): 031610.
Paper No: TRIB-17-1125
Published Online: January 18, 2018
...), sliding velocity (1, 1.5, and 2 m/s), and sliding distance (500, 1000, and 1500 m). Microstructural characterization demonstrated uniform dispersion of hybrid reinforcement particles onto the copper surface along with good bonding. Hardness of the developed surface composites increased with respect to...
Journal Articles
Article Type: Research-Article
J. Tribol. May 2018, 140(3): 031603.
Paper No: TRIB-17-1021
Published Online: October 23, 2017
... received September 21, 2017; published online October 23, 2017. Assoc. Editor: Sinan Muftu. 16 01 2017 21 09 2017 Coatings Friction Hardness Micro-tribology Wear Wear mechanisms Although steel is widely used in various industrial fields because of its important mechanical...
Journal Articles
Article Type: Research-Article
J. Tribol. March 2018, 140(2): 021606.
Paper No: TRIB-17-1152
Published Online: October 6, 2017
... through heat treatment. Samples from of the inner zone (9–15 mm) were considered for heat treatment, as this zone has higher concentration of less dense hard reinforcement particles. The samples were solutionized (620 °C/60 min) and water quenched followed by aging at different temperatures (400, 450, and...
Journal Articles
Article Type: Research-Article
J. Tribol. March 2018, 140(2): 022002.
Paper No: TRIB-17-1107
Published Online: September 29, 2017
... strength, hardness, and surface morphology of worn surface were examined. This investigation confirmed that 0.1% multiwalled carbon nanotubes (MWCNTs) reduced wear rate, CoF for all combinations of composite with carbon fiber. Results indicate that 0.1% (MWCNTs) and 10% SCF-filled composite had superior...
Journal Articles
Article Type: Research-Article
J. Tribol. March 2018, 140(2): 021603.
Paper No: TRIB-17-1148
Published Online: September 29, 2017
...Vineet Tirth AA2218–Al 2 O 3 (TiO 2 ) composites are synthesized by stirring 2, 5, and 7 wt % of 1:2 mixture of Al 2 O 3 :TiO 2 powders in molten AA2218 alloy. T61 heat-treated composites characterized for microstructure and hardness. Dry sliding wear tests conducted on pin-on-disk setup at...
Journal Articles
Article Type: Research-Article
J. Tribol. March 2018, 140(2): 021601.
Paper No: TRIB-17-1069
Published Online: August 24, 2017
...) analysis and hardness measurements. Thermal and wear tests of the gears are conducted over a range of rotational speed (500–1700 rpm) and torque (0.8–3.2 N·m). Thermal and wear behavior of developed gears is successfully analyzed using Taguchi methodology and analysis of variance (ANOVA). The service life...
Journal Articles
Article Type: Research-Article
J. Tribol. January 2018, 140(1): 011608.
Paper No: TRIB-16-1388
Published Online: August 22, 2017
.... The effects of sintering temperature on densification and mechanical properties of composites have been investigated in detail. SiC–TiB 2 and SiC–TiB 2 –TaC composites sintered at 2100 °C showed high Vickers hardness value, i.e., 27.20 ± 1.23 GPa and 26.40 ± 0.80 GPa, respectively, under 1 kgf (9.81 N...
Journal Articles
Article Type: Research-Article
J. Tribol. January 2018, 140(1): 011602.
Paper No: TRIB-17-1004
Published Online: July 21, 2017
...Auezhan Amanov; Bakhtiyor Urmanov; Ki-Chol Kim; Young-Sik Pyun This paper deals with the improvement in surface properties and microscratch resistance of graphites by means of an ultrasonic nanocrystalline surface modification (UNSM) technique. The surface roughness and surface hardness of the...