The Mechanical Properties of Si+ and Pb+ Implanted Al

1983 ◽  
Vol 27 ◽  
Author(s):  
P.B. Madakson
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Wear Resistance ◽  
Precipitation Hardening ◽  
Surface Oxidation ◽  
Linear Increase ◽  
Commercially Pure ◽  
Dislocation Movement ◽  
Dose Dependent ◽  
Al Matrix

ABSTRACTCommercially pure Al was implanted with 300 keV Si+ and 200 keV Pb+ to doses of between l011 and 1017 ions/cm2. Changes in friction, wear, oxidation and hardness were investigated. Silicon increased the hardness and wear resistance of Al and significantly decreased friction and the oxidation of the implanted surface. These changes were observed to be almost proportional to the implanted dose. The implantation of Pb+ resulted in a linear increase in hardness and a decrease in surface oxidation with dose. Friction decreased and wear resistance increased but the changes were not dose dependent. The implantation of Si+ did not significantly alter the distribution of impurities, such as Fe and Cu within the Al matrix, but Pb+ resulted in a diffusion of Fe to the implanted surface. Formation of precipitates was observed and the improvements in the surface properties studied are considered to result from precipitation hardening, which involves the impediment of dislocation movement by the precipitates during plastic deformation of the implanted Al.

Influences of SiC Particle Size and Content on the Mechanical Properties and Wear Resistance of the Composites with Al Matrix

2008 ◽  
Vol 375-376 ◽  
pp. 430-434 ◽  
Author(s):  
Yi Yi Tao ◽  
Xiao Lan Ge ◽  
Xiao Jing Xu ◽  
Zuo Jiang
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Tensile Strength ◽  
Wear Resistance ◽  
Wear Properties ◽  
Reinforcing Effect ◽  
Sic Particles ◽  
Al Matrix ◽  
Sic Particle

The SiCp/Al composites reinforced by SiC particles with various sizes and contents were prepared by cold compacting and subsequent hot extruding. The mechanical and wear properties of the compositions were investigated and the relevant mechanisms were discussed. It has been shown that the tensile strength and wear resistance increases with increasing SiCp content. SiC particles have a remarkable reinforcing effect on matrix Al. The composite with larger SiCp size (14μm) possesses better wear resistance than that with smaller SiCp size (130nm).

Improved wear resistance and mechanical properties of Al matrix with TiAl-based coatings

2021 ◽  
pp. 1-9
Author(s):  
Yichuan Yin ◽  
Sheng Zhu ◽  
Qing Chang ◽  
Wenyu Wang ◽  
Guangyuan Gao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Al Matrix

Wear and Mechanical Properties of Fe-28Al and Fe-28Al-10Ti Alloys

2011 ◽  
Vol 295-297 ◽  
pp. 256-259
Author(s):  
Jing Li ◽  
Jin Shan Zhao
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Plastic Deformation ◽  
Wear Resistance ◽  
Sliding Wear ◽  
Bulk Material ◽  
Wear Test ◽  
Long Distance ◽  
Wear Performance ◽  
Worn Surface

Fe-28Al and Fe-28Al-10Ti alloys were prepared by mechanical alloying and hot pressed sintering. The mechanical properties and wear resistance were studied. The results show that Fe-28Al bulk material is mainly characterized by the low ordered B2 Fe3Al structure with some dispersed Al2O3 particles. The mechanical properties such as the hardness and strength of Fe-28Al-10Ti are significantly improved compared with Fe-28Al, which is attributed to the grain refinement and solid solution reinforcing with the addition of Ti element. The fracture mode is mainly the intergranular fracture. Fe-28Al-10Ti exhibits more excellent wear resistance than Fe-28Al, especially after long distance sliding wear test. There is difference in wear mechanisms of Fe-28Al and Fe-28Al-10Ti alloys. Under the load of 100N, there is obvious plastic deformation on the worn surface of Fe-28Al. Micro-crack and layer splitting occur on the surface of Fe-28Al. The main wear performance of Fe-28Al-10Ti is particle abrasion, the characteristics of which are micro cutting and micro furrows.

Influence of AlCuSc Ternary Phase on the Microstructure and Properties of 1469 Alloy

2014 ◽  
Vol 794-796 ◽  
pp. 1057-1062 ◽  
Author(s):  
Min Jia ◽  
Zi Qiao Zheng ◽  
Xian Fu Luo
Keyword(s):  
Mechanical Properties ◽  
Ternary Phase ◽  
Precipitation Hardening ◽  
Aging Treatment ◽  
High Strength ◽  
Coarse Particles ◽  
Negative Effects ◽  
Type Alloy ◽  
Close Relationship ◽  
Al Matrix

Microstructure evolution and mechanical properties of a 1469 alloy and a Sc-free1469 type alloy were examined. SEM observation indicates that AlCuSc ternary phases (W) are formed after homogenization annealing, and cannot be dissolved during the following heat treatments. These coarse particles consume abundant Cu atoms from the Al matrix that are available for solutioning, which results in the decrease of precipitation of the T1 phase during aging treatment. The W phase has negative effects on the examined alloy’s mechanical properties. The tensile strength of Sc-added alloy is 40MPa lower than that of the Sc-free alloy. The formation of the W phase has a close relationship with Cu/Sc ratio, which shows the importance of controlling the concentration of Cu and addition of Sc. Formation of W phase suppress the effect of precipitation hardening of the T1 phase in high strength Al-Cu-Li alloys

Effect of Zr Addition on the Mechanical Behavior, Ductility and Wear Resistance of Aluminum Grain Refined by Titanium

2010 ◽  
Vol 442 ◽  
pp. 15-25 ◽  
Author(s):  
A.I.O. Zaid ◽  
S.M.A. Al-Qawabah
Keyword(s):  
Mechanical Properties ◽  
Phase Diagram ◽  
Wear Resistance ◽  
Mechanical Behavior ◽  
Grain Refinement ◽  
Pure Aluminum ◽  
Columnar Structure ◽  
Grain Refining ◽  
Commercially Pure ◽  
Zr Addition

Aluminum and its alloys are the second most commonly used metal for a variety of engineering applications. They solidify in columnar structure with large grain size which normally affects their mechanical behavior and surface quality. It is now becoming customary in aluminum foundry to grain refine their structure by adding either titanium or titanium + boron to their melt before solidification. In this paper, the effect of addition of Ti on the mechanical properties, ductility and wear resistance of commercially pure aluminum is investigated. Titanium was added at a level of 0.15 % wt. This ratio corresponds to the peritictic limit on the Al-Ti phase diagram and is normally used for grain refining of aluminum. It was found that addition of Ti at this level resulted in grain refinement of aluminum structure whereas addition of Zr alone resulted in grain coarsening of Al structure while it resulted in grain refinement when it is added in the presence of Ti. Regarding the effect of Zr on the wear resistance of aluminum it was found that at small loads and speeds addition of Ti or Zr or both together resulted in deterioration of its wear resistance whereas at higher loads and speeds resulted in pronounced improvement of its wear resistance.

Cold Spraying of IN 718-Ni Composite Coatings: Microstructure Characterization and Tribological Performance

2021 ◽  
Vol 1016 ◽  
pp. 840-845
Author(s):  
Roberto Biagi ◽  
Elisa Verna ◽  
Edoardo Bemborad ◽  
Maurizio Galetto ◽  
Shuo Yin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Wear Resistance ◽  
Composite Coatings ◽  
Cold Spraying ◽  
Deposition Efficiency ◽  
Tribological Performance ◽  
Production Costs ◽  
Wear Behaviour ◽  
Resistance Performance

INCONEL 718 superalloy (IN 718) is frequently used in highly aggressive environments, such as aerospace and gas turbine engines, where excellent mechanical properties, creep-, fatigue- and oxidation-resistance performance at high and cryogenic temperatures are required. Recent studies have successfully cold sprayed IN 718, showing great potential mainly in maintenance and repairing fields. However, due to the low plastic deformation, the manufacture of IN 718 cold sprayed coatings often requires the use of expensive propulsive gases or high working parameters to enhance deposition efficiency, with a significant increase in production costs. This paper investigates for the first time the addition of Ni to IN 718 powders in order to increase plastic deformation and interparticle bonding strength. Four composite coatings were deposited via a high-pressure cold spray process using nitrogen as propulsive gas, considering different IN 718 mass fractions in the feedstock: C1 (0 wt%), C2 (25 wt%), C3 (50 wt%), C4 (75 wt%). The coatings are examined in terms of microstructural characteristics and tribological performance. The addition of IN 718 particles significantly improves the mechanical properties of the coatings, despite an increase in porosity, which however does not exceed 1%. The tribological performance of the four coatings is investigated using a pin-on-disk test, demonstrating that the coating wear resistance behaviour improved as the IN 718 content increased. Analysis of the wear mechanism shows that C4 coating has a different wear behaviour than the other coatings, thus achieving the best wear-resistance performance.

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