Surface and interface characteristics of CeO2 doped Al2O3 coating on solution treated and peak aged AZ91 Mg alloy

2017 ◽  
Vol 332 ◽  
pp. 511-521 ◽  
Author(s):  
Sanjeet Kumar ◽  
Deepak Kumar ◽  
Jayant Jain
Keyword(s):  
Mg Alloy ◽  
Al2o3 Coating ◽  
Surface And Interface ◽  
Solution Treated ◽  
Interface Characteristics ◽  
Peak Aged

Tribological Study of Heat Treated AZ91 Alloy against Al6351 under Dry Conditions

2017 ◽  
Vol 737 ◽  
pp. 168-173 ◽  
Author(s):  
Sanjeet Kumar ◽  
Jayant Jain ◽  
Deepak Kumar
Keyword(s):  
Mg Alloy ◽  
Az91 Alloy ◽  
Initial Attempt ◽  
Hardness Tester ◽  
Aerospace Applications ◽  
Solution Treated ◽  
Heat Treated ◽  
Pin On Disc ◽  
Dry Conditions ◽  
Peak Aged

AZ91 Mg alloy is one of the most suitable alloy of magnesium for automotive and aerospace applications. In this study, tribological evaluation of AZ91 Mg alloy is performed against Al6351 alloy under dry sliding condition. The load was kept constant for a range (0.05-0.2 m/s) of sliding velocities. This study can be seen as an initial attempt in the direction of employment of Mg alloy for a dynamic engine component. The experiments were conducted on the solution treated and peak aged AZ91 Mg alloy by making a tribo pair with Al6351 alloy on a pin on disc setup under dry condition. The AZ91 and Al6351 alloys were used as a pin and a disc (flat) materials, respectively. The samples were characterized using hardness tester, tribometer and SEM/EDS. The wear mechanisms were identified by analyzing the worn surfaces and wear debris using SEM.

Influence of load, sliding speed, and microstructure on wear response of AZ91 Mg alloy

2016 ◽  
Vol 230 (12) ◽  
pp. 1462-1469 ◽  
Author(s):  
Sanjeet Kumar ◽  
Deepak Kumar ◽  
Jayant Jain ◽  
Jaswant Kumar Hirwani
Keyword(s):  
Wear Resistance ◽  
Mg Alloy ◽  
Aged Alloy ◽  
Al Alloy ◽  
Aged Sample ◽  
Sliding Speed ◽  
Solution Treated ◽  
Low Load ◽  
Peak Aged ◽  
Wear Response

This article deals with the tribological study of solution-treated and peak aged AZ91 Mg alloy. Tribological studies were carried out using reciprocating sliding contact under lubricated conditions. The effect of load, sliding speed, and microstructure on wear response of AZ91 Mg alloy was investigated. The wear response was characterized using optical microscopy, scanning electron microscope, and energy dispersive X-ray spectroscopy mapping. The peak aged alloy showed excellent wear resistance against Al6351 Al alloy as compared with solution-treated alloy. The formation of γ-Mg17Al12 precipitates in aged sample was found to increase the wear resistance. The specific wear rate for peak aged alloy was almost one-third than that of solution-treated alloy. In both the samples, i.e. solution-treated and peak aged, the coefficient of friction decreases with increase in sliding speed at low load, while the behavior of peak aged sample was found to be opposite at higher load. At low load, the wear mode for peak aged sample was oxidative which further shifted to adhesive at higher loads.

Aging hardening and precipitate behavior of a solution-treated Mg-6Zn-4Sn-1Mn (wt.%) wrought Mg alloy

2021 ◽  
pp. 161640
Author(s):  
Caihong Hou ◽  
Fan Hu ◽  
Fugang Qi ◽  
Nie Zhao ◽  
Dechuang Zhang ◽  
...  
Keyword(s):  
Mg Alloy ◽  
Solution Treated ◽  
Aging Hardening

scholarly journals Mechanical Properties and Very High Cycle Fatigue Behavior of Peak-Aged AA7021 Alloy

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1023 ◽  
Author(s):  
Byung-Hoon Lee ◽  
Sung-Woo Park ◽  
Soong-Keun Hyun ◽  
In-Sik Cho ◽  
Kyung-Taek Kim
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Solution Treated ◽  
Very High Cycle Fatigue ◽  
Peak Aged ◽  
Very High

The effect of heat treatment condition on non-Cu AA7021 alloy was investigated with respect to mechanical properties and very high cycle fatigue behavior. With a focus on the influence of heat treatment, AA7021 alloy was solution heat-treated at 470 °C for 4 h and aged at 124 °C. Comparing the results of solution-treated and peak-aged AA7021 alloy shows a significant increase in Vickers hardness and tensile strength. The hardness of AA7021 alloy was increased by 65% after aging treatment, and both tensile strength and yield strength were increased by 50~80 MPa in each case. In particular, this paper investigated the very high cycle fatigue behavior of AA7021 alloy with the ultrasonic fatigue testing method using a resonance frequency of 20 kHz. The fatigue results showed that the stress amplitude of peak-aged AA7021 alloy was about 50 MPa higher than the solution-treated alloy at the same fatigue cycles. Furthermore, it was confirmed that the size of the crack initiation site was larger after peak aging than after solution treatment.

Atom probe tomographic study of elemental segregation at grain boundaries for a peak-aged Al–Zn–Mg alloy

2014 ◽  
Vol 79 ◽  
pp. 1-4 ◽  
Author(s):  
X.Y. Sun ◽  
B. Zhang ◽  
H.Q. Lin ◽  
Y. Zhou ◽  
L. Sun ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Atom Probe ◽  
Mg Alloy ◽  
Elemental Segregation ◽  
Peak Aged

scholarly journals The Effects of Thermal Ageing on Properties and Microstructure of Al-6063 Alloy

2016 ◽  
Vol 694 ◽  
pp. 111-115
Author(s):  
C.N. Aiza Jaafar ◽  
I. Zainol ◽  
Mohd Amirul Zalif Mohamad Sapri
Keyword(s):  
Electron Microscope ◽  
Elevated Temperatures ◽  
Tensile Tests ◽  
Thermal Ageing ◽  
Aged Alloy ◽  
Surface Fracture ◽  
Solution Treated ◽  
Transmission Electron ◽  
Peak Aged Condition ◽  
Peak Aged

The effect of thermal ageing on the properties and microstructure of Al-Mg-Si alloy was investigated. In this work, an extruded Al-6063 alloy samples were used as the main materials. In order to study the effect of thermal ageing, the alloy samples were solution treated at 530 °C and then quenched into water before artificially aged at elevated temperatures between 120 and 250 °C. The ageing response and mechanical properties was monitored by Vickers hardness and tensile tests, respectively. The analysis of surface fracture and microstructure of peak aged alloy were carried out by means of scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. Result shows that the highest hardness value and tensile properties is gained by the alloy that aged at 120 °C. It is found that increasing in hardness and strength values of the alloy are due to precipitates formation during thermal ageing. Fracture analysis on peak-aged condition indicates that the alloy having more ductility after thermal ageing. The result shows that the higher ageing temperature will lead to the higher ductility of the Al-6063 alloy, as a results the alloy’s strength is reduced.

Surface and interface characteristics of SiC coatings by chemical vapor deposition

2005 ◽  
Vol 40 (8) ◽  
pp. 2109-2111 ◽  
Author(s):  
Rong-Jun Liu ◽  
Chang-Rui Zhang ◽  
Xiao-Yang Liu ◽  
Xin-Gui Zhou ◽  
Ying-Bin Cao
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Surface And Interface ◽  
Interface Characteristics ◽  
Sic Coatings
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