New Magnesium Wrought Alloys

Jaschik, Christian; Haferkamp, H.; Niemeyer, M.

doi:10.1002/3527607552.ch7

Cited by 13 publications

(2 citation statements)

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“…One of the drawbacks of magnesium alloys however is that magnesium has an hexagonal closepacked crystal structure which limits the number of available slip systems [5][6][7]. Thus, magnesium alloys are relatively brittle, and it is difficult to manufacture components with complex geometries (such as wheels) by forging, and therefore for many applications magnesium components are produced by casting.…”

Section: Introductionmentioning

confidence: 99%

Effect of shot peening on the fatigue behaviour of cast magnesium A8

Barry

Hainsworth

Fitzpatrick

2009

Materials Science and Engineering: A

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractShot peening is known to improve the fatigue performance of structural metallic materials. The improvement in fatigue life is derived primarily from compressive residual stresses that are introduced into the near-surface of the components and which hinder crack initiation and growth.Magnesium alloys are finding increasing use in automotive applications, but their relatively low strength means that they are highly susceptible to fatigue failures. This is particularly the case for cast alloys which may contain high levels of porosity. Shot peening may be of use, but the beneficial effect of the compressive stress may be offset by the surface damage associated with peening of a soft material.In this study the fatigue life of sand-cast A8 magnesium alloy has been investigated before and after a shot peening treatment to investigate whether shot peening is beneficial for a component with this combination of relatively low strength and relatively poor initial surface finish. Previous studies into the effect of shot peening on magnesium alloys have been limited to wrought alloys and there has been little work on the influence of shot peening on cast magnesium alloys. The residual stress before and after peening was determined by incremental hole drilling which shows that the peening process generated a compressive residual stress in the cast specimens. The fatigue results show that the fatigue life is significantly improved by the shot peening process, and there is also an improvement in the endurance limit. An increase in the surface roughness of the samples was found after peening but this was not found to be detrimental to the fatigue performance.

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Section: Introductionmentioning

confidence: 99%

Effect of shot peening on the fatigue behaviour of cast magnesium A8

Barry

Hainsworth

Fitzpatrick

2009

Materials Science and Engineering: A

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“…Lightweight alloys, based on Mg, Al, Ti, or Be are an important class of materials for a plethora of modern technical applications ranging from automotive and transportation applications [1][2][3][4] to architecture, 5,6 to corrosion resistant parts for air-and spacecrafts, [7][8][9][10][11] non-sparking tools, 12,13 all the way to materials for medical applications like stents or implants. [9][10][11]14 Intermetallic compounds play an important role in some of these alloys.…”

Section: Introductionmentioning

confidence: 99%