Dendritic Spacing/Columnar Grain Diameter of Al–2Mg–Zn Alloys Affecting Hardness, Tensile Properties, and Dry Sliding Wear in the As‐Cast/Heat‐Treated Conditions

2020 ◽  
Vol 22 (3) ◽  
pp. 1901145
Author(s):  
Carolina Ache ◽  
Maiquel Lopes ◽  
Bernardo Reis ◽  
Amauri Garcia ◽  
Carlos dos Santos
Keyword(s):  
Tensile Properties ◽  
Sliding Wear ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Dendritic Spacing ◽  
Heat Treated ◽  
Columnar Grain ◽  
Zn Alloys ◽  
Grain Diameter

scholarly journals Investigation of dry sliding wear properties of multi-directional forged Mg–Zn alloys

2019 ◽  
Vol 7 (3) ◽  
pp. 444-455 ◽  
Author(s):  
S. Ramesh ◽  
Gajanan Anne ◽  
H. Shivananda Nayaka ◽  
Sandeep Sahu ◽  
M.R. Ramesh
Keyword(s):  
Sliding Wear ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Zn Alloys

Evaluation of Wear Properties of Stir Cast AA7050 -10% B4C Ex Situ Composite through Fuzzy-TOPSIS MCDM Method

2019 ◽  
Vol 291 ◽  
pp. 1-12
Author(s):  
Arvind Kumar ◽  
Ram Naresh Rai
Keyword(s):  
Wear Rate ◽  
Sliding Wear ◽  
Fuzzy Topsis ◽  
Ex Situ ◽  
Dry Sliding Wear ◽  
Homogeneous Distribution ◽  
Dry Sliding ◽  
Wear Properties ◽  
Heat Treated ◽  
Mcdm Method

The present paper discussed the dry sliding wear and friction behavior of flux assisted stir cast AA7050-10% B4C composite. The K2TiF6 flux improves the wettability of B4C in molten aluminium. The casted composite were heat treated as per T-6 standard. The microstructure studies confirm the uniform distribution of B4C with the layers of Ti compound around it. Both As Casted Composite hereafter called as ACC and Heat Treated Composite hereafter called as HTC under gone dry sliding wear test at room temperature. The experiments were designed using Taguchi L18 mixed design. The responses of the experiment were optimized using fuzzy-TOPSIS MCDM method. From the experimental investigation it was concluded that wear rate of the composite material is a function of normal loads and sliding speed. Moreover, wear rate, coefficient of friction and amount of heat generation for HTC is comparatively less than ACC. This may due to the homogeneous distribution of particles and also formation proper interfacial bond between matrix and reinforcements after heat treatment.

Dry Sliding Wear Mechanisms of the High Nitrogen Austenitic 18Cr-18Mn-2Mo-0.9N Steel at Different Applied Loads

2007 ◽  
Vol 26-28 ◽  
pp. 37-40
Author(s):  
Yong Suk Kim ◽  
Seung Duk Kim ◽  
Sung Joon Kim
Keyword(s):  
Cross Sections ◽  
Wear Mechanisms ◽  
Wear Debris ◽  
Sliding Wear ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
High Nitrogen ◽  
Heat Treated ◽  
Nitrogen Steel ◽  
Increase Rate

Sliding wear mechanisms of the solution treated 18Cr-18Mn-2Mo-0.9N high nitrogen steel (HNS) were studied. Room-temperature dry sliding wear tests of the steel were carried out at various applied loads to explore the mechanism as a function of the load. The wear rate of the steel increased with the increase of the load; however, the increase rate was not constant. The rate increased slowly at low loads, rapidly at intermediate loads, and finally, the increase-rate became low again at high loads. Worn surfaces, their cross sections, and wear debris were examined, and phases of the heat-treated HNS as well as the wear debris were identified to find out the mechanism. The wear of the steel was found to be controlled by the tribo-oxidation, strain-induced phase transformation, and reverse transformation due to temperature rise on a wearing surface. The influence of each mechanism on the rate varied depending on the magnitude of the applied load.

Study of Microstructure and Wear Behavior of T6 Heat Treated as Cast Al-25Mg2Si-2Cu Alloy

2015 ◽  
Vol 830-831 ◽  
pp. 358-361 ◽  
Author(s):  
D.G. Sondur ◽  
D.M. Goudar ◽  
D.G. Mallapur ◽  
G.B. Rudrakshi
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Cast Alloy ◽  
Wear Test ◽  
Wear Behaviour ◽  
High Wear Resistance ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Heat Treated

In the present investigation, microstructural characteristics and dry sliding wear behaviour of T6 heat treated conventionally cast Al-25Mg2Si-2Cu alloy have been discussed. The as cast alloy was subjected to solutionizing at 500°C for 5h and isothermal aging treatment at 190°C for different aging times. The micro structural characterization was studied using Scanning Electron Microscope with EDS analysis. The microstructure of as cast alloy consists of intermetallics of coarse block like sharp edged β-(Mg2Si), θ-(Al2Cu) and Q-(Al-Mg-Cu-Si) in the form of Chinese scripts and needles distributed randomly in the Al-matrix. The microstructure of heat treated alloy shows spheroidization of β phase and fine precipitation of θ-(Al2Cu) and Q phases. The dry sliding wear test was carried out using pin-on-disc machine. Age hardened alloy exhibits high wear resistance and minimum coefficient of friction over the entire range of applied loads and sliding velocities. Furthermore, high wear resistance was observed in the under aged condition compared to over ageing conditions.

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