1st ICAI 2020

International Conference on Automotive Industry 2020

Mladá Boleslav, Czech Republic

directly magnesium melt as an input material that is simultaneously cooled down and rolled by rolls. Beside rolling technology, extrusion (both warm and hot) and forging are also used. Nevertheless, they represent quite a low portion of the wrought magnesium products inventory. Main composition and properties are in Table 2.

Table 2: Nominal composition and typical tensile properties of selected wrought magnesium alloys

Tensile properties

Designation (acc. To ASTM)

Nominal Composition [wt%]

Tensile Strength [MPa]

Condition

Elongation [%]

0.2% Proof Stress [MPa]

Sheet, plate F Extrusions F

70

200 230 200 240 250 230 200 260 275

4 4 4 6 4 4 7 7

M1

Mn 1.5

130 105

Forgings F

Sheet, plate O 120

11

H24

160 130 105 180 160

AZ31 Al 3, Zn 1, Mn 0.3

Extrusions F Forgings F Extrusions F Forgings F

AZ61 Al 6.5, Zn 1, Mn 0.3

AZ80 Al 8.5, Zn 0.5, Mn 0.2

Forgings T6

200

290

6

Sheet, plate O 120

240 250 235

11

ZM21

Zn 2, Mn 1

H24

165 155

6 8

Extrusions Sheet, plate H24

170

230

4

HK31

Zr 0.7, Th 3.2

Extrusions T5

180

255

4

Sheet, plate T8

135

215

6

HM21

Mn 0.8, Th 2

T81

180 175

255 225

3 3

Forgings T5 Sheet, plate T7

Al 1.2, Mn 0.15, Li 14

95

115

10

LA141

Source: POLMEAR, I. Light Alloys – From Traditional Alloys to Nanocrystals

3. Possibilities of using magnesium alloys in the automotive industry The possibilities of using magnesium in the automotive industry are very wide. The use of light metals such as aluminum and magnesium has a long tradition here. The increased use of magnesium has mainly been hampered by its difficult processability

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