Next Article in Journal
Dislocation-Free SiGe/Si Heterostructures
Next Article in Special Issue
The Mechanical Properties and Corrosion Resistance of Magnesium Alloys with Different Alloying Elements for Bone Repair
Previous Article in Journal
Copper Delafossites under High Pressure—A Brief Review of XRD and Raman Spectroscopic Studies
Open AccessArticle

The Effects of Rare Earth Pr and Heat Treatment on the Wear Properties of AZ91 Alloy

by Ning Li 1,2 and Hong Yan 1,*
1
School of Mechanical Electrical Engineering, Nanchang University, Nanchang 330031, China
2
School of Aviation Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330069, China
*
Author to whom correspondence should be addressed.
Crystals 2018, 8(6), 256; https://doi.org/10.3390/cryst8060256
Received: 19 May 2018 / Revised: 11 June 2018 / Accepted: 14 June 2018 / Published: 19 June 2018
This paper investigated the influences of Pr addition and heat treatment (T6) on the dry sliding wear behavior of AZ91 alloy. The wear rates and friction coefficients were measured by using a pin-on-disc tribometer under loads of 30, 60 and 90 N at dry sliding speeds of 100 rpm, over a sliding time of 15 min. The worn surfaces were examined using a scanning electron microscope and was analyzed with an energy dispersive spectrometer. The experimental results revealed that AZ91-1.0%Pr magnesium alloy exhibited lower wear rate and friction coefficient than the other investigated alloys. As the applied load increased, the wear rate and friction coefficient increased. Compared with the as-cast AZ91-1.0%Pr magnesium alloy, the hardness and wear resistance of the alloy after solution treatment were reduced, and through the subsequent aging, the hardness and wear resistance of the alloy were improved and the hardness was 101.1 HB (compared to as-cast AZ91 magnesium alloy, it increased by 45%). The AZ91-1.0%Pr with T6 magnesium alloy exhibited best wear resistance. Abrasion was dominant at load of 30 N, delamination was dominant at load of 60 N and plastic deformation was dominant at load of 90 N. Oxidation was observed at all loads. View Full-Text
Keywords: AZ91 alloy; Pr; heat treatment; wear resistance AZ91 alloy; Pr; heat treatment; wear resistance
Show Figures

Figure 1

MDPI and ACS Style

Li, N.; Yan, H. The Effects of Rare Earth Pr and Heat Treatment on the Wear Properties of AZ91 Alloy. Crystals 2018, 8, 256.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop