Research on surface properties of Ti-6Al-4V alloy by multi-ultrasonic rolling

2021 ◽  
pp. 095440622098419
Author(s):  
Pengcheng Wang ◽  
Yongzhi Pan ◽  
Yanjie Liu ◽  
Xiuli Fu ◽  
Hongxia Li
Keyword(s):  
Mechanical Properties ◽  
Wear Mechanism ◽  
Energy Dispersive Spectrometer ◽  
Microscopic Analysis ◽  
Rolling Process ◽  
Material Surface ◽  
Three Dimension ◽  
X Ray Diffraction ◽  
Surface Performance ◽  
Oxidation Wear

The main purpose of this paper was to investigate the effect of the multiple ultrasonic surface rolling process (USRP) on the surface mechanical properties and wear mechanism of Ti-6Al-4V. Firstly, X-ray diffraction (XRD) microscopic analysis, work hardening and residual stress were used to measure and characterize the surface performance by USRP. The friction coefficient and wear morphology were obtained by the scanning electron microscope (SEM), three-dimension (3D) white light interferometer and energy dispersive spectrometer (EDS). The results showed that the material surface mechanical properties was effectively improved by the USRP, and the surface grains were refined to form nanoscale. It also can be found that the wear resistance of the material surface was effected by the surface mechanical properties. With the increase of processing, the main wear mechanism changed from delamination-based oxidation wear to adhesive wear with the increase of processing.

MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HYPEREUTECTIC Al-Si/AlNp COMPOSITE

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1377-1382 ◽  
Author(s):  
SEULKI PARK ◽  
JINMYUNG CHOI ◽  
BONGGYU PARK ◽  
IKMIN PARK ◽  
YONGHO PARK ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Dispersive Spectrometer ◽  
Microstructural Characterization ◽  
Weight Fraction ◽  
Reinforcement Particle ◽  
Hot Press ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superior Mechanical Properties ◽  
Phase Evaluation

Hypereutectic Al - Si alloys with fine and evenly distributed Si precipitates have superior mechanical properties In this study, hypereutectic Al - Si alloy powders which contained 15 and 20wt% Si were prepared by a gas atomization process. 1, 3 and 5wt% AlN particles were blended with the Al - Si alloy powders using turbular mixer. The mixture was consolidated by Hot Press at 550°C for 1h under 60MPa. Relative density of the sintered samples was about 98% of theoretical density. This study was investigated by two ways. One is the effect of reinforcement weight fraction and the other is the effect of Silicon contents on the mechanical properties of the composite. Microstructural characterization and phase evaluation were carried out using X-ray Diffraction, Scanning Electron Microscopy equipped with Energy Dispersive Spectrometer. The results showed that the smaller the reinforcement particle size was and the better its distribution was, the higher ultimate tensile strength and hardness were.

Microstructure and Mechanical Properties of Wrought Mg-4.1Li-2.5Al-1.7Zn-1Sn Alloy

2011 ◽  
Vol 341-342 ◽  
pp. 31-35
Author(s):  
Rui Zhi Wu ◽  
Da Yong Li ◽  
Xu He Liu ◽  
Mi Lin Zhang
Keyword(s):  
Mechanical Properties ◽  
Inductively Coupled Plasma ◽  
Energy Dispersive Spectrometer ◽  
Atomic Emission ◽  
Rolling Process ◽  
Optical Microscope ◽  
Atomic Diffusion ◽  
Strengthening Effect ◽  
Inductively Coupled ◽  
Rolling Deformation

An Mg-Li-Al-Zn-Sn alloy was prepared by vacuum melting. The actual content of the elements in the alloy was determined using inductively coupled plasma-atomic emission mass spectrometry (ICP-AEMS). The density of the alloy was detected using Archimedes’ method. Extrusion and rolling deformation were carried out on this alloy. Its microstructures and mechanical properties were then studied with an optical microscope (OM), scanning electronic microscope (SEM), X-ray diffractometer (XRD), energy dispersive spectrometer (EDS), and tensile tester. The extruded alloy was composed of α-Mg and Mg2Sn phases and had good strength and elongation properties as well as a good comprehensive performance. After further rolling deformation, an Al-Li phase appeared due to atomic diffusion during the hot rolling process. Strain-hardening and the strengthening effect of the Al-Li phase further improved the strength of the alloy but decreased its elongation capacity.

Synthesis and characterization of 7075 Al alloy–SiC composites

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rajesh Kumar Bhushan
Keyword(s):  
Mechanical Properties ◽  
Electron Probe ◽  
Microscopic Analysis ◽  
Casting Process ◽  
Stir Casting ◽  
Al Alloy ◽  
X Ray Diffraction ◽  
Content Type ◽  
X Ray ◽  
7075 Al Alloy

PurposeMechanical properties are highly sensitive to the microstructure, and these are indirectly related to solidification parameters and processing conditions. AA7075 possesses lightweight and excellent properties as structural material which can be optimized with SiCp addition and a good fabrication technique.Design/methodology/approach7000 series aluminium alloys exhibit the highest mechanical properties. They are used for high-strength structural applications such as aircraft parts and sporting goods. The desirable properties of these alloys are: low density, high stiffness, specific strength, good wear resistance and creep resistance. The focus of this work is to investigate the microstructure of composites formed by the dispersion of silicon carbide particles (SiC) into AA7075 by stir casting processes. 7075 Al alloy is reinforced with 10 and 15 wt.% SiCp of size 10–20 µm by stir casting process. The composites have been characterized by X-ray diffraction and scanning electron microscopy, differential thermal analysis and electron probe microscopic analysis.FindingsSiCp distribution and interaction with AA7075 matrix have been studied. AA7075/10 wt.%/SiCp (10–20 µm) and AA7075/15 wt.%/SiCp (10–20 µm) composites microstructure showed excellent SiCp distribution into AA7075 matrix. In addition, no evidence of secondary chemical reactions has been observed in X-ray diffraction and electron probe microscopic analysis.Originality/valueLittle experimental work has been reported so far about effect of addition of 10 and 15 wt.% SiCp of size (10–20 µm) on the microstructure of 7075 Al alloy fabricated by stir casting process. The present investigation has been carried out to study the microstructure and carry out XRD, DTA and EPMA analysis of 7075 Al alloy, 10 and 15 wt.% SiCp of size (10–20 µm) composite and detect the interfacial reactions with the objective to minimize the formation of Al4C3.

Microstructure and friction-wear performances of laser-cladded nano-CeO2–reinforced NiCoCrAlY coatings at high temperature

2020 ◽  
Vol 234 (14) ◽  
pp. 1695-1706
Author(s):  
Li Jiaxing ◽  
Xu Jie ◽  
Kong Dejun
Keyword(s):  
Mass Fraction ◽  
Energy Dispersive Spectrometer ◽  
Wear Test ◽  
Chemical Compositions ◽  
X Ray Diffraction ◽  
Wear Rates ◽  
Mass Fractions ◽  
The Coefficient Of Friction ◽  
Oxidation Wear ◽  
Main Factor

Nano-CeO2–reinforced NiCoCrAlY coatings were fabricated on Ti6Al4V alloy using laser cladding. The morphologies, chemical compositions, and phases of obtained coatings were analyzed using a scanning electron microscope, energy-dispersive spectrometer, and X-ray diffraction, respectively, and the effects of nano-CeO2 mass fraction on the coefficient of friction and the wear rate of NiCoCrAlY coating at 600 °C were investigated using a ball-on-disk wear test. The results show that the nano-CeO2–reinforced NiCoCrAlY coating is mainly composed of NiTi2, Ti3O, CoO, and β-Ti phases, while the new phases of AlTi3 and (Ni, Co)2Ti4O are formed after the wear test. The average coefficients of friction of NiCoCrAlY coatings with the nano-CeO2 mass fractions of 0%, 2%, 4%, and 6% are 0.699, 0.655, 0.636, and 0.615, respectively, and the corresponding wear rates are 4.04 × 10−7, 3.95 × 10−7, 3.13 × 10−7, and 2.35 × 10−7 mm3 N−1 m−1, respectively, which decrease with the increase of nano-CeO2 mass fraction. The wear mechanism is primary adhesive wear and oxidation wear, accompanied by slight abrasive wear, and the addition of nano-CeO2 is the main factor that is enhancing wear resistance.

scholarly journals Microstructural and Mechanical Properties of Binary Ti-Rich Fe–Ti, Al-Rich Fe–Al, and Ti–Al Alloys

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 433 ◽  
Author(s):  
Daoud Chanbi ◽  
Leïla Adnane Amara ◽  
Erick Ogam ◽  
Sif Amara ◽  
Zine Fellah
Keyword(s):  
Mechanical Properties ◽  
Energy Dispersive Spectrometer ◽  
Annealing Treatment ◽  
Al Alloys ◽  
Arc Furnace ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rich Alloy ◽  
Scanning Electron

Three series of binary, FeTi (Ti-rich), FeAl and TiAl (Al-rich) alloy samples were produced in an argon arc furnace. An annealing treatment of 72 h at 1000 °C was applied to the samples, giving rise to different equilibrium microstructures depending on chemical composition. Their mechanical properties were studied through the determination of elastic constants that measure the stiffness of the elaborated materials. Young’s modulus of the binary alloys was determined using Resonance Ultrasonic Vibration (RUV). The accuracy of this technique was demonstrated. A scanning electron microscope (SEM) with an energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) made it possible to identify intermetallic compounds FeTi and Fe 2 Ti, FeAl and Fe Al 2 , and TiAl and Ti Al 2 in respective systems Fe–Ti, Fe–Al, and Ti–Al. The link between their composition, microstructure, and elastic properties was established.

The Wear Mechanism Analysis for the Surface of Aluminum Brass in Recoil Brake

2013 ◽  
Vol 773 ◽  
pp. 402-405 ◽  
Author(s):  
Kai Bo Cui ◽  
Jun Qi Qin ◽  
Chang Chun Di ◽  
Yu Liang Yang
Keyword(s):  
Wear Mechanism ◽  
Energy Dispersive Spectrometer ◽  
Microscopic Analysis ◽  
Mechanism Analysis ◽  
Cavitation Damage ◽  
Chemical Corrosion ◽  
Research Objects ◽  
Repair Facility ◽  
Scanning Electron

To study the malfunction cause and wear mechanism of aluminum brass in gun recoil brake, based on microscopic analysis technology, scrapped throttling ring from the repair facility as research objects, the throttling ring wear mechanism is analyzed systematically from the microscopic point integrated use of metallurgical microscope analysis, scanning electron microscopy and energy dispersive spectrometer analysis. Studies show that, as one of the vital components in recoil brake, the throttling ring made of aluminum brass is due to the composite role of erosive abrasion, chemical corrosion and cavitation damage leading to failure. The method can provide reference for the improvement of the throttling ring and the failure analysis of similar alloy parts.

scholarly journals Effects of Boron and Carbon Added Titanium Filler on Microstructure and Mechanical Properties of Ti-15-3 Alloy Weldments

2019 ◽  
Vol 7 (4.14) ◽  
pp. 538
Author(s):  
Izzul Adli Bin Mohd Arif ◽  
Mahesh Kumar Talari ◽  
N Kishore Babu ◽  
Ahmad Lutfi Bin Anis ◽  
Muhammad Hussain Ismail ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Grain Refinement ◽  
Microscopic Analysis ◽  
X Ray Diffraction ◽  
Electron Microscopic ◽  
Gas Tungsten Arc ◽  
Beta Titanium ◽  
Scanning Electron Microscopic ◽  
Scanning Electron Microscopic Analysis

Microstructural and mechanical properties beta Titanium (β-Ti) weldments can be improved by grain refinement and formation of insoluble precipitates in the weld. This paper reports the effect of Boron (B) and Carbon (C) addition to Ti-15V-3Cr-3Sn-3Al (Ti-15-3) fillers on the microstructural and mechanical properties of Ti-15-3 gas tungsten arc weldments. X-ray diffraction and scanning electron microscopic analysis revealed the presence of β-Ti phase in the weldments prepared without the filler modification, while additional TiB and TiC phases are observed in the weldments prepared with fillers modified with B and C, respectively. B and C addition to the fillers has resulted in the grain refinement of the weldments and the grain size reduction is seen to be higher with the increasing B and C addition. The formation of TiB, TiC and growth restriction effect due to the presence of B and C in the filler resulted in the decreased grain size of the β-Ti weldments. Mechanical properties such as hardness and tensile strength improved as the amount of B and C addition increased. The improvement of mechanical properties is contributed by the grain refinement and the formation of TiB and TiC precipitates in weldments. 

EFFECTS OF LOADS ON HIGH-TEMPERATURE FRICTION-WEAR PROPERTIES OF CATHODIC ARC ION PLATED TiALSiN COATINGS

2017 ◽  
Vol 24 (Supp02) ◽  
pp. 1850034
Author(s):  
KONG DEJUN ◽  
TANG CHENGJIAN
Keyword(s):  
High Temperature ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Energy Dispersive Spectrometer ◽  
Chemical Compositions ◽  
Wear Properties ◽  
Cathodic Arc ◽  
Oxidation Wear ◽  
Tialsin Coating ◽  
Electronic Microscope

A TiAlSiN coating was deposited on H13 hot work mould steel using a cathodic arc ion plating (CAIP). The friction-wear performances of the obtained coating under different loads were characterized on an HT-1000 type high temperature tribological tester at 800[Formula: see text]C. The morphologies and chemical compositions of the worn tracks were analyzed using a scanning electronic microscope (SEM) and its configured energy dispersive spectrometer (EDS), respectively, and the corresponding wear mechanisms were discussed. The results show that the average coefficient of friction (COF) of the TiAlSiN coating at the loads of 2, 4 and 6[Formula: see text]N is 0.3072, 0.3040, and 0.4114, respectively, the COFs of the coating are stable at the loads of 2 and 4[Formula: see text]N, while those at the load of 6[Formula: see text]N are obviously increased. Under the load of 2[Formula: see text]N, a small amount of large and scattered white debris disperses on the worn track, the wear mechanism is adhesive wear. While the white wear debris appears on the worn track under the load of 4[Formula: see text]N, the COFs are relatively stable, due to the effects of oxide layer on the worn track, and the wear mechanism is abrasive wear and oxidation wear. Under the load of 6[Formula: see text]N, a number of shallow grooves and cracks appear on the worn tracks, showing that the coating is basically worn out, the wear mechanism is abrasive wear and oxidation wear.

A STUDY OF THE MECHANICAL CHARACTERISTICS OF ULTRASONIC COLD FORGED SKD61

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4541-4546 ◽  
Author(s):  
CHANG-MIN SUH ◽  
GIL-HO SONG ◽  
HAE-DOO PARK ◽  
YOUNG SHICK PYOUN
Keyword(s):  
Mechanical Properties ◽  
Cold Rolling ◽  
Compressive Residual Stress ◽  
Mechanical Characteristics ◽  
Cutting Tool ◽  
Rolling Process ◽  
Cold Forging ◽  
Material Surface ◽  
Steel Mill ◽  
Fatigue Characteristics

Ultrasonic Cold Forging (UCF) technology is a method that to induces intensive plastic deformation on a material surface, so that the structure of the material becomes very fine from the surface to a certain depth. It improves the mechanical properties, hardness, compressive residual stress, and the wear and fatigue characteristics of the surface. In this study, UCF technology is applied to a cutting tool on a rolling process at a steel mill. At first, the ultrasonic cold forged specimens of SKD-61 are prepared and tested to verify the effects of UCF technology with regard to the mechanical properties, UCF is applied to the trimming knives of the cold rolling process. It is found that UCF improves the mechanical properties effectively and it is a pratical method that can improve the service time needed for the trimming knives. The productivity of the cold rolling process can be increased by the application of the ultrasonic cold forged trimming knives.

Wear Mechanism of PVD TiAlN Coated Cemented Carbide Tool in Dry Turning Titanium Alloy TC4

2013 ◽  
Vol 652-654 ◽  
pp. 2200-2204 ◽  
Author(s):  
Bao Lin Wang ◽  
Xing Ai ◽  
Zhan Qiang Liu ◽  
Ji Gang Liu
Keyword(s):  
Titanium Alloy ◽  
Wear Mechanism ◽  
Energy Dispersive Spectrometer ◽  
Cutting Tools ◽  
Cemented Carbide ◽  
No Oxidation ◽  
Cemented Carbide Tool ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide ◽  
Oxidation Wear

This paper presents investigations on turning TC4 alloy with PVD TiAlN coated cemented carbide inserts. The turning test was conducted with variable cutting speeds ranging from 80 to 120 m/min. Wear surfaces of the cutting tools are analyzed to study the wear mechanism of PVD TiAlN coated cemented carbide tools in turning of titanium alloy TC4. Scanning Electron Microscope (SEM) and Energy Dispersive Spectrometer( EDS) analyses by wear maps indicated that the wear of coated cemented carbide tools was caused by adhesion, coating delamination and mechanical fatigue. The analysis of EDS indicated no oxidation wear generated during the machining. The excellent chemical stability and oxidation resistance performance of TiAlN coating made contribution to prevent oxidation wear.

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