Wear Properties of an In-Situ Processed TiC-Reinforced Bronze

2010 ◽  
Vol 1276 ◽  
Author(s):  
R. Sanchez ◽  
H. F Lopez
Keyword(s):  
Constant Load ◽  
Wear Properties ◽  
Centrifugally Cast ◽  
Abrasive Particles ◽  
Wear Rates ◽  
Weight Losses ◽  
Unreinforced Material ◽  
Three Body ◽  
Pin On Disk

AbstractIn this work, an Al-bronze alloy is reinforced with TiC through reaction of the alloy melt with methane gas. The resultant alloy is then centrifugally cast in cylindrical molds. It is found that the surface at the inner diameter of the cast contained in-situ produced TiC as well as Fe-rich inclusions. Metallographic observations using optical and scanning electron microscopy confirmed the presence of TiC particles (30 % volume), alpha and beta grains including iron precipitates. Cylindrical pins are machined from the inner surface and tested under various conditions in a three pin on disk Falex machine. Pins are tested under a constant load of 2.86 MPa and friction and wear rates are determined from measurements of weight losses versus wear lengths. It is found that under the applied load the reinforced material exhibits high friction and relatively low wear when compared with the unreinforced material. Apparently, under these conditions the TiC particles become abrasive particles thus contributing to wear of the steel counter-face through three body abrasive wear.

Wear performance of selective laser melted Ti-6Al-4V alloy in situ modified with oxygen and boron

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040027
Author(s):  
Ben Jackson ◽  
Rob Torrens ◽  
Leandro Bolzoni ◽  
Fei Yang ◽  
Nigel Ross ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
Saline Solution ◽  
Wear Properties ◽  
Short Term ◽  
Wear Performance ◽  
Three Body Abrasion ◽  
Three Body ◽  
Metal Additive

Titanium alloys have poor wear performance, with severe adhesive wear and three-body abrasion being dominant mechanisms. To extend the use of titanium to applications demanding better wear properties, modifications can be made to the alloys. This can include the addition of hard particulates or interstitial strengthening, by increasing the oxygen or nitrogen content. The metal additive manufacturing process of selective laser melting (SLM) has been shown to enable manufacture of these modified titanium alloys in situ. In this study, small amounts of boron and titanium dioxide powders were added to Ti-6Al-4V (Ti64) and processed using SLM. To compare wear performance of these modified materials, reciprocating pin on plate tests in brine solution were performed. Increased oxygen content increased the hardness of the material, which reduced wear. The presence of boron increased wear in the short term but reduced the long-term wear rate. Incorporating of oxygen and boron has been shown to improve the saline solution wear properties of Ti64 against silicon nitride.

Wear Properties of Metal Matrix Composite Al-Cu and Al-Cu-TiB2

2015 ◽  
Vol 819 ◽  
pp. 268-273 ◽  
Author(s):  
Ramli Rosmamuhamadani ◽  
Shamsuddin Sulaiman ◽  
Mohd Idris Shah Ismail ◽  
Mohamed Arif Azmah Hanim ◽  
Mahesh Talari
Keyword(s):  
Wear Rate ◽  
Metal Matrix ◽  
Wear Behavior ◽  
Optical Microscope ◽  
Constant Load ◽  
Matrix Composites ◽  
Wear Properties ◽  
Casting Technique ◽  
Cu Alloy

Tensile and wear properties of aluminium (Al) based metal matrix composites (MMCs) was prepared by added titanium diboride (TiB2) with in-situ technique by salt route. The salts used in this research were potassium hexafluorotitanate (K2TiF6) and potassium tetrafluoroborate (KBF4). Nanocomposite samples were prepared by casting technique associated with incorporating 3 and 6 wt.% of TiB2 into matrix of Al-6wt.%Cu. Instron and wear tests machine were used to characterize the tensile and wear Al-Cu alloys properties. Results showed that increase in TiB2 content gave the high properties of tensile and wear behavior. The study indicates that TiB2 particles have giving improvement the wear performance of the Al–6wt.%Cu alloy. For a constant load and sliding speed, the wear rate decreases as a function of amount of TiB2 in the composite. The wear rate decrease with increasing in wt.% TiB2 particles for the all loads applied. However, addition of TiB2 particle to the Al–6 wt%.Cu matrix has show the coefficient value of wear decreases regardless of applied load. Study of the wear surfaces both alloy and composites by optical microscope suggests that the improvement in wear resistance is mainly due to the formation of finer groove or debris by content of TiB2.

The Effect of Processes Parameters on the Abrasive Wear Resistance of Boronized AISI 1050 Steel

2016 ◽  
Author(s):  
Mete Han Boztepe ◽  
Melih Bayramoglu
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Mesh Size ◽  
High Hardness ◽  
High Strength ◽  
Constant Load ◽  
Abrasive Wear Resistance ◽  
Wear Testing ◽  
Wear Properties ◽  
Pin On Disk

Boronizing is one of the thermochemical surface treatment processes which is extensively used to obtain excellent mechanical properties such as high strength, very high hardness, good toughness and fracture toughness. In this study, AISI 1050 steel specimens have been subjected to pack boronizing process by using Ekabor 2 powder within the stainless steel seal container. The experiments were carried out at temperatures of 800 °C, 850 °C and 900 °C for 3, 6 and 9 hours to investigate the effect of these parameters on the wear resistance of boronized specimens. Pin-on-Disk wear testing is used to characterize wear properties of boronized specimens. Wear tests were performed at dry conditions under constant load of 30 N by using 220 mesh size Al2O3 abrasive paper. Different rotating speeds of the pin-on disk were selected as 300, 600, 900, 1200, 1500 revolutions for each of the test specimens. After the abrasive tests, weight losses of the specimens were measured to determine the abrasive wear resistance of boronized specimens. The results were also compared with unboronized and conventional hardened AISI 1050 steel specimens respectively.

Influence of Tempering Temperature and Microstructure on Wear Properties of Low Alloy PM Steel with 1-2 % Ni Addition

2007 ◽  
Vol 534-536 ◽  
pp. 629-632
Author(s):  
Süleyman Tekeli ◽  
Ahmet Güral ◽  
Metin Gürü
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Constant Load ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Wear Coefficient ◽  
Tempering Temperature ◽  
Pin On Disk ◽  
Cold Pressed

The effect of tempering temperature and microstructure on dry sliding wear behavior of quenched and tempered PM steels was investigated. For this purpose, atomized iron powder was mixed with 0.3 % graphite and 1-2 % Ni powders. The mixed powders were cold pressed and sintered at 1200°C. The sintered specimens were quenched from 890°C and then tempered at 200°C and 600°C for 1 hr. Wear tests were carried out on the quenched+tempered specimens under dry sliding wear conditions using a pin-on-disk type machine at constant load and speed. The experimental results showed that the wear coefficient effectively increased with increasing tempering temperature. With increasing Ni content, the wear coefficient slightly decreased at all tempering temperatures due to the high amount of Ni-rich austenitic areas.

Effects of Environment on the Wear Behavior of P/M Ti-47Al-2Cr-0.2Mo

2018 ◽  
Vol 770 ◽  
pp. 106-115
Author(s):  
Jing Wen Qiu ◽  
Di Pan ◽  
Yong Liu ◽  
Ian Baker ◽  
Wei Dong Zhang
Keyword(s):  
Wear Behavior ◽  
High Stress ◽  
Dry Sliding Wear ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wear Rates ◽  
Disk Material ◽  
Three Body ◽  
Pin On Disk ◽  
Wear Tests

The wear behavior of powder metallurgical Ti-47Al-2Cr-0.2Mo alloy prepared by pre-alloyed powders was investigated using pin-on-disk wear tests in different environments, viz, argon, 4% hydrogen in nitrogen, air and oxygen. The disk material was sinter-hot isostatically pressed, yttria-stabilized zirconia. Lower wear rates were found for the TiAl pins in oxygen-free environments, indicating that oxygen play a key role in the wear rate. In contrast, the presence of molecular hydrogen and moisture have nearly no effect. A combination of X-ray diffraction and energy dispersive X-ray spectroscopy indicated that the abrasive particles present mainly consisted of the zirconia. In addition, zirconia particles were embedded in the worn tips of the TiAl pins and mixed into the tribolayers. The high stress and high contact temperature at the wear surface made the zirconia disk undergo a phase transformation during the dry sliding wear, accompanied by grain pullout, surface uplifting and microcracking. The hard tribolayer with embedded zirconia particles provides some protection against further wear of the TiAl pin. The highly localized, repetitive shear stress during the wear tests may bring about amorphous TiAl in the wear debris. The main wear mechanisms were abrasive wear of two-body and three-body, some delamination and plastic deformation.

The Effects of Sliding Parameters on Dry Wear Characteristics of Ti-6Al-4V Alloy

2015 ◽  
Vol 1115 ◽  
pp. 213-216 ◽  
Author(s):  
Mohammed Baba Ndaliman ◽  
Katsina Christopher Bala ◽  
Ahsan Ali Khan ◽  
Mohammad Yeakub Ali ◽  
Umma Abdullahi ◽  
...  
Keyword(s):  
Wear Rate ◽  
Wear Behavior ◽  
Weight Ratio ◽  
High Strength ◽  
Surface Wear ◽  
Wear Properties ◽  
Wear Rates ◽  
Sliding Motion ◽  
Study Results ◽  
Pin On Disk

Titanium (Ti-6Al-4V) alloy is very attractive for many applications due to its high strength-to-weight ratio and high corrosion resistance. Even then, with these attractive properties, it has poor shear strength and surface wear properties. This study is therefore undertaken to investigate the effect of sliding parameters on the surface wear behavior of Ti-6Al-4V alloy. Pin-like specimens of the alloy were produced and subjected to sliding motion on a pin-on-disk apparatus using different speeds, loads and sliding distances. The surface and specific wear rates of the alloy were evaluated as the main output of the study. Results indicate that the most severe surface wear rate of over 0.008 mm3/sec is experienced under conditions of low disk speed (50 rpm) with high input weight (46.5 N). Higher sliding distance is also found to affect the severity of the surface wear rate. All results of specific wear rates evaluated indicate that Ti-6Al-4V alloy can be classified as a low surface wear resistance material when operated under sliding counterface.

Tribological Parameters of Copper-Alumina Composite

2012 ◽  
Vol 527 ◽  
pp. 191-196
Author(s):  
Pavol Hvizdoš ◽  
Priit Kulu ◽  
Michal Besterci
Keyword(s):  
Coefficient Of Friction ◽  
Structural Characteristics ◽  
Wear Properties ◽  
Wear Rates ◽  
Fine Grained ◽  
Angular Pressing ◽  
The Coefficient Of Friction ◽  
Alumina Composite ◽  
Increasing Temperature ◽  
Pin On Disk

Basic mechanical and wear properties of a commercial copper based composite Glidcop were studied. A Glidcop AL-60 grade (with 1.1 wt.% Al2O3) was used as the initial material. It was further treated by the Equal Channel Angular Pressing (ECAP) process in order to induce massive plastic deformation and to achieve very fine grained microstructure. Both, as-received and ECAP-ed materials were then characterized and the results compared. Hardness and elasticity modulus of the experimental materials were measured by instrumented indentation. Tribological properties were studied by pin-on-disk technique in dry sliding against a steel ball at a various temperatures from room temperature up to 600 °C. For all systems the coefficient of friction and specific wear rates were evaluated. Worn surfaces were studied by scanning electron microscopy and level of oxidation was measured using EDX spectrometry. It was found that above 200 °C the coefficient of friction decreased by about 50 %. The wear resistance with increasing temperature increased due to formation of harder oxide rich surface layer. Damage mechanisms were identified and their relationship with structural characteristics was inferred.

Al-4.5 Cu-3.8 Fe In Situ Composites: Effect of Rolling on Microstructure and Wear Properties

2011 ◽  
Vol 264-265 ◽  
pp. 1939-1943 ◽  
Author(s):  
S.K. Shaha ◽  
A.S.W. Kurny ◽  
Mahbub Hasan ◽  
S. Dyuti
Keyword(s):  
Wear Rate ◽  
Solidification Process ◽  
Hardness Measurement ◽  
Optical Microscope ◽  
Wear Testing ◽  
Wear Properties ◽  
In Situ Composites ◽  
Pin On Disk ◽  
Hot Rolled

Al based MMCs have attracted a lot of attention particularly for their desirable combination of high stiffness and low specific gravity. In the present study, Al-4.5Cu-3.8Fe in-situ composites were manufactured by using solidification process. During solidification Al-Fe intermetallic was formed in a matrix of Al-Cu alloy. The composite was hot rolled at different degree using a two high rolling mill. Subsequently the composites were characterized by SEM, XRD, hardness measurement and wear testing. Wear testing was conducted on a pin-on-disk machine by applying 10 KN load. After the wear tests, the worn surfaces of the composite specimens were examined under an optical microscope. According to experimental results, as cast in-situ composites exhibited the highest wear rate. The hardness increased and wear rate decreased with the extent of rolling. The presence of reinforcing Al3Fe phase and fragmentation of those particles during hot rolling are suggested to contribute to the better wear resistance of the composites. The extent of abrasive wear was largest in the case of as cast composites, as evidenced by deep grooves on the worn surface and highest weight loss.

Microstructure and Wear Properties of TiC-Al Composite Fabricated by Field Activated and Low-Pressure Assisted Combustion Synthesis

2011 ◽  
Vol 287-290 ◽  
pp. 2998-3001
Author(s):  
Qiao Dan Hu ◽  
Peng Luo ◽  
Meng Xian Zhang ◽  
Mou Sheng Song ◽  
Jian Guo Li
Keyword(s):  
Combustion Synthesis ◽  
Low Pressure ◽  
Wear Properties ◽  
Al Content ◽  
In Situ Fabrication ◽  
Al Composite ◽  
Uniform Dispersion ◽  
Novel Method ◽  
Three Body

A novel method termed field activated and low pressure assisted combustion synthesis (FALPCS) was developed for an in situ fabrication of TiC-Al composite from Ti, C and Al elemental powders. With the Al content of 30 wt% and application of a pressure as low as 2 MPa, a highly dense sample was successfully obtained on a versatile Gleeble thermal simulation instrument. The TiC particles are fine in the order of ~0.5 µm, with a uniform dispersion in aluminum. The study on un-lubricated sliding wear of the synthesized material revealed a wear mechanism that combines the characteristics of both adhesive and three-body abrasions.

Tribological Property of WC Cermet Coatings Sprayed by Using an Improved HVOF Process

2005 ◽  
Author(s):  
Y. Ishikawa ◽  
J. Kawakita ◽  
S. Kuroda
Keyword(s):  
Surface Oxidation ◽  
Wear Properties ◽  
Cermet Coatings ◽  
Wear Rates ◽  
Spray Process ◽  
Hvof Spray ◽  
Heat Treated ◽  
Mild Wear ◽  
Pin On Disk ◽  
Sprayed Coatings

An improved HVOF spray process called “Gas-shrouded HVOF” (GS-HVOF) has been developed over the past several years. By using an extension nozzle at the exit of a commercial HVOF spray gun, GS-HVOF is capable of controlling the oxidation of sprayed materials during flight as well as achieving higher velocity of sprayed particles. These features result in extremely dense and clean microstructure of the sprayed coatings. The process has been successfully applied to corrosion resistant alloys such as SUS316L, HastelloyC, and alloy 625 as well as cermets such as WC-Cr3C2-Ni. Wear properties of WC cermet coatings were measured by using a pin-on-disk wear tester. The specific wear rates of the coatings prepared by the GS-HVOF with a reducing (fuel rich) flame were close to that of chrome plating. The wear amount of the heat-treated GS-HVOF coatings could not be detected after testing. It is believed that transition to mild wear appeared early because of the increased surface oxidation due to the heat treatment.

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