Next Article in Journal
Customised Alloy Blends for In-Situ Al339 Alloy Formation Using Anchorless Selective Laser Melting
Previous Article in Journal
Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana
Open AccessArticle

Effect of Heat Treatment on the Microstructure of Mg-4Al-Nd Alloys

School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, Bhubaneswar 751007, Odisha, India
CSIR (Council of Scientific and Industrial Research)-Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India
Author to whom correspondence should be addressed.
Academic Editor: Manoj Gupta
Technologies 2017, 5(2), 23;
Received: 27 March 2017 / Revised: 17 May 2017 / Accepted: 18 May 2017 / Published: 23 May 2017
(This article belongs to the Section Innovations in Materials Processing)
In the present work, Mg-4Al-xNd (x = 0, 1, 4 wt.%) alloys were prepared by a stir casting method, and the effect of the addition of Neodymium (Nd) as-cast and of heat-treated microstructures was studied. The addition of 1 wt.% Nd preferentially formed the Al2Nd phase and completely suppressed the formation of the intermetallic Mg17Al12 (γ) phase, which was initially present in the base alloy (Mg-4Al alloys). On increasing the Nd percentage from 1 to 4 wt.% in the base alloy, two intermetallic phases, Al2Nd and Al11Nd3, were observed in the microstructure, as higher levels of Nd led to a peritectic reaction between Al and the Al2Nd phase, and part of the Al2Nd transformed into the Al11Nd3 phase. The hardness of the as-cast alloy increased with the Nd content. Thus, the hardness increased from 57.1 ± 4.1 Hv of Mg-4Al to 66.5 ± 2.6 Hv of Mg-4Al-4Nd. It was also found that solutionizing and isothermal aging of alloys containing Nd at 180 °C for 96 h led to the size reduction of Al- and Nd-containing intermetallics without altering their morphologies. Further, it was found that Nd does not have any effect on the aging kinetics of the alloys because all of the alloys with and without Nd attained peak hardness at 24 h of aging time. View Full-Text
Keywords: magnesium alloys; microstructure; Neodymium; intermetallics; Vickers micro hardness magnesium alloys; microstructure; Neodymium; intermetallics; Vickers micro hardness
Show Figures

Figure 1

MDPI and ACS Style

Mishra, S.; Chaubey, A.; Mandal, A. Effect of Heat Treatment on the Microstructure of Mg-4Al-Nd Alloys. Technologies 2017, 5, 23.

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

Back to TopTop