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:10.1002/9781118805497.ch31

Cited by 17 publications

(8 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microstructure of Mg-Al-RE alloys dictates the creep resistance of AE42 alloy. For as cast AE42 die cast alloy, the following microstructural details are generally agreed among researchers: 26,[34][35][36] Lamellae of Al 4 RE (also reported as Al 11 RE 3 ) dominate the interdendritic microstructure, which also contains minor amounts of particulate Al 2 RE phase (Fig. 5a).…”

Section: Microstructuresupporting

confidence: 53%

“…At 175uC, the compressive stress retention of AE42 dropped considerably, to 40%, as was expected from the earlier study. 31 This drop has been explained by Powell et al 34 as being due to the decomposition of Al 11 E 3 with the subsequent formation of Mg 17 Al 12 in the AE42 alloy. The AX(J) alloys do not demonstrate the same deterioration with increasing temperature and retain nearly as much load as they did at 150uC; 65 as against 72%.…”

Section: Tensile and Compressive Creepmentioning

confidence: 87%

“…5a). 34 The RE used in AE42 alloy consists primarily of cerium (about 67%) and lanthanum (about 33%), which make the Al 4 RE phase in this alloy a mixture of Al 4 Ce and Al 4 La. Since these phases are present at the grain boundaries, they provide a very effective hindrance to grain boundary sliding, 35 the dominant mechanism for creep in Mg-Al based die casting alloys.…”

Section: Microstructurementioning

confidence: 99%

“…SEM images showing typical AE42 alloy microstructure a as cast and b after testing at 175uC34 6 Tensile yield strength of AM50 and AX(J) alloys at room temperature and 175uC12 …”

mentioning

confidence: 99%

See 3 more Smart Citations

Recent magnesium alloy development for elevated temperature applications

Luo¹

2004

International Materials Reviews

881

125

View full text Add to dashboard Cite

Creep resistance is a major requirement for the use of magnesium in automotive powertrain components that are currently made of aluminium or cast iron. This paper summarises various new magnesium alloys that have been developed in recent years for elevated temperature applications. The alloy development basis, mechanical properties, creep resistance, bolt-load retention characteristics, and microstructure of seven new alloy systems (

show abstract

Section: Microstructuresupporting

confidence: 53%

Section: Tensile and Compressive Creepmentioning

confidence: 87%

Section: Microstructurementioning

confidence: 99%

“…SEM images showing typical AE42 alloy microstructure a as cast and b after testing at 175uC34 6 Tensile yield strength of AM50 and AX(J) alloys at room temperature and 175uC12 …”

mentioning

confidence: 99%

See 2 more Smart Citations

Recent magnesium alloy development for elevated temperature applications

Luo¹

2004

International Materials Reviews

881

125

View full text Add to dashboard Cite

show abstract

“…The previous investigation reported that the thermostability of Al 11 La 3 was not high and it would decompose into Al 2 La and Al when the temperature rose to 150uC. 6,8 Therefore, the particles shown in Fig. 9b might be Al 2 La.…”

Section: Microstructure Of Specimens After Creep Testmentioning

confidence: 91%

Effects of calcium additions on microstructure and creep behaviour of AE42 alloy

Xue¹,

Yangshan²,

Ding³

et al. 2005

Materials Science and Technology

View full text Add to dashboard Cite

The as cast microstructure of alloy AE42 is composed of the a-Mg matrix and Al 11 RE 3 compound, which is unstable and decomposes to Al 2 RE and Mg 17 Al 12 (b) at temperatures above 150uC. A small amount of calcium added to the AE42 alloy results in a significant microstructure refinement and formation of Al 2 Ca compound, which shows two kinds of morphologies: eutectic lamellar at grain boundaries of the a matrix and tiny lamellar in the matrix grains. With the increase of added calcium the volume fraction of Al 2 Ca increases, while Al 11 RE 3 decreases in the AE42 alloy. Creep resistance of the alloy is significantly improved with calcium addition. The microstructure of the specimen after creep tests at 175uC and 70 MPa with 2% of calcium addition has no obvious changes compared to that before the creep test, indicating Al 2 Ca has high thermal stability, which is the key factor in creep resistance improvement.

show abstract