The Relationship between Microstructure and Creep Behavior in AE42 Magnesium Die Casting Alloy

Powell, Bob R.; Rezhets, Vadim; Balogh, Michael P.; Waldo, Richard A.

doi:10.1002/9781118859803.ch45

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unlike the CE method, SQS fixes the type of lattice considering the relevant one-, two-, and three body interactions instead of possible multiple configures [70]. Besides, the mixing enthalpy H x has been calculated as a basis for evaluating the stability of Al 32 RE1 1−x RE2 x (RE1 = La, Ce, Pr, Nd; RE2 is the rest RE atoms), as following [71]:…”

Section: Stability and Mechanical Propertymentioning

confidence: 99%

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al₂RE phases in Al-based alloys at finite temperatures

et al. 2023

View full text Add to dashboard Cite

The structural stability, mechanical properties, internal nucleation and growth mechanisms, and surface energies of Al2RE (RE=Sc, Y, La-Lu) second phases in Al alloys have been investigated by combining first-principles calculations with the Debye model. The results show that the lattice mismatch of Al2RE precipitates with Al matrix, which determines the strength of materials associated with dislocation slips, are closely related to the transferred electron et between Al and RE atoms. Furthermore, the methods of cluster expansion (CE) and special quasi-random structures (SQS) have been adopted to calculate the mixing enthalpy Hx of Al2RE11-xRE2x (RE1=La, Ce, Pr, Nd; RE2 is the rest RE atoms) for studying the possibility of replacing in the Al2RE (RE=La, Ce, Pr, Nd) compounds, which is explored in experiments, and it is found that the mixing enthalpy Hx increases with the substitute concentration. The calculated elastic constant Cij, bulk modulus B, shear modulus G, Young’s modulus E decrease with increasing atomic number from Sc to Y at first, and then increases to Lu; while the Cauchy pressure C12-C44 and pugh’s ratio B/G show the opposite trends. Moreover, the critical nucleation radius R* and coarsening rate KLSW of Al2RE are obtained from the classical nucleation theory (CNT) and LSW model, respectively. The results show that, the R* for all interfaces decreases from Y to La at first, and then increases linearly to Lu; whereas the KLSW of all models increases from Y to Ce firstly, and then changes very little. Finally, the calculated surface energy Esur of all Al2RE compounds is much higher than that of Al, and with the increase of atomic number, Esur of Al2RE intermetallic compounds decreases firstly from Sc to La, and then increases to Lu. The result is helpful for the further optimal designing high performance of Al alloys.

show abstract

Section: Stability and Mechanical Propertymentioning

confidence: 99%

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al₂RE phases in Al-based alloys at finite temperatures

et al. 2023

View full text Add to dashboard Cite

show abstract

“…based die-cast alloys were developed [5,6]. Representative alloys are the widely used AZ91 AM50 and AM60 alloys, the Mg-Al-Si alloys (AS21X, AS31, AS41) [7,8], the Mg-Al-Ca alloy (AX51, AX52) [9], the Mg-Al-Sr alloy (AJ52) and the Noranda alloy Mg-6Al-2Sr-Ca (AJ62X) [10][11][12], the Mg-Sr-Ca alloy (AJX500) [5], the General Motors alloy Mg-Al-Ca-Sr (AX52J, AXJ530, AXJ531) [13,14], the Mg-9Al-1Ca-Sr alloy (MRI153A) and the Mg-8Al-1Ca-Sr alloy (MRI153M) [15,16], the Mg-6.5Al-2Ca-1Sn-Sr alloy (MRI230D) [17][18][19], the Nissan alloy Mg-Al-Ca-RE [20], the Honda alloy Mg-5Al-2Ca-2RE (ACM522) [21], the Mg-0.5Zn-6Al-1Ca-3RE alloy (ZACE05613) and the Mg-0.5Zn-4Al-1Ca-1RE alloy (ZACE05411) [22], the Mg-4Al-RE (La, Ce) alloys (AE42, AE44) [23][24][25], the Mg-Al-Ba-Ca alloy [26], etc. The Mg-4Al-4RE (AE44) alloy is a major achievement among the Mg-Al based die-cast alloys with good combination of die castability, mechanical properties at elevated temperatures, and good corrosion resistance [25,27].…”

mentioning

confidence: 99%

Development of an Mg–RE-Based Die-Cast Magnesium Alloy for Elevated Applications

Dong

Feng

Nyberg³

et al. 2021

The Minerals, Metals &Amp; Materials Series

View full text Add to dashboard Cite

The development of magnesium (Mg) alloys capable of operating at the demanding working temperature of above 200 °C and the ability of using high pressure die casting for high-volume manufacturing are the most advanced development in manufacturing critical parts for internal combustion (IC) engines used in power tools. Here we introduce the development of a Mg-RE based die-cast Mg alloy for elevated applications in small IC engines. The developed Mg-RE based die-cast Mg alloy shows good ambient and high temperature strength, and it also has excellent high temperature creep resistance. In addition, the developed Mg-RE based die-cast Mg alloy shows good stiffness at elevated temperatures. Furthermore, the developed Mg-RE based die-cast Mg alloy exhibits good thermal conductivity at ambient and high temperatures, which is a key point that is normally neglected during the development of high temperature Mg alloys.

show abstract

Effects of Gd/Nd ratio on the microstructures and tensile creep behavior of Mg–8Al–Gd–Nd alloys crept at 423K

Yang

Wang

Zhang

et al. 2021

Journal of Materials Research and Technology

View full text Add to dashboard Cite

The Relationship between Microstructure and Creep Behavior in AE42 Magnesium Die Casting Alloy

Cited by 3 publications

References 8 publications

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al₂RE phases in Al-based alloys at finite temperatures

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al₂RE phases in Al-based alloys at finite temperatures

Development of an Mg–RE-Based Die-Cast Magnesium Alloy for Elevated Applications

Effects of Gd/Nd ratio on the microstructures and tensile creep behavior of Mg–8Al–Gd–Nd alloys crept at 423K

Contact Info

Product

Resources

About

The Relationship between Microstructure and Creep Behavior in AE42 Magnesium Die Casting Alloy

Cited by 3 publications

References 8 publications

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al2RE phases in Al-based alloys at finite temperatures

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al2RE phases in Al-based alloys at finite temperatures

Development of an Mg–RE-Based Die-Cast Magnesium Alloy for Elevated Applications

Effects of Gd/Nd ratio on the microstructures and tensile creep behavior of Mg–8Al–Gd–Nd alloys crept at 423K

Contact Info

Product

Resources

About

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al₂RE phases in Al-based alloys at finite temperatures

First-principles study of the mixing effects of rare earth solute atoms on the physical properties of Al₂RE phases in Al-based alloys at finite temperatures