Surface World May 2018 Surface World May 2018 - Page 48

Many different aluminium alloys are available, each with distinct properties. Employing a non- destructive but precise material analysis method during incoming goods inspection ensures that the alloy’s components are found in the correct concentrations – and that the received goods can, in fact, be utilised for the intended purpose. The properties of aluminium alloys can be greatly modified by adding different constituents. For example, adding copper increases strength, but the resulting alloy cannot be welded; on the other hand, manganese lends good plasticity and corrosion properties. Magnesium, silicon, zinc and many other alloy constituents are also used to modify hardness, strength and ductility, to protect against corrosion and the effects of temperature, and to control thermal and electrical conductivity. In addition, the constituents influence the processing properties of the alloys: while some can only be welded in an argon environment, others cannot be machined or shaped, but might be suitable for casting. This means that an incoming goods inspection at, for example, an automotive or aerospace supplier must verify that the alloy contains no copper, because of its negative effect on corrosion and welding properties. Since even small amounts of an additive can 46 Sample 1 96.61 2.459 0.000 0.033 0.018 0.150 S 0.112 0.103 0.020 0.003 0.002 0.002 Sample 2 99.00 0.339 0.290 0.024 0.001 0.023 S 0.079 0.058 0.047 0.003 0.000 0.001 Sample 3 96.20 2.896 0.000 0.033 0.017 0.150 S 0.104 0.092 0.029 0.003 0.001 0.002 Sample 4 96.36 2.711 0.004 0.033 0.017 0.150 S 0.061 0.057 0.029 0.003 0.001 0.002 Sample 1 0.428 0.027 0.050 0.095 0.015 0.015 S 0.004 0.001 0.001 0.000 0.001 0.001 Sample 2 0.184 0.026 0.001 0.002 0.010 0.002 S 0.002 0.000 0.000 0.000 0.002 0.000 Sample 3 0.432 0.027 0.051 0.094 0.014 0.015 S 0.004 0.001 0.001 0.000 0.001 0.000 Sample 4 0.418 0.027 0.050 0.094 0.015 0.015 S 0.003 0.000 0.001 0.001 0.001 0.000 substantially influence the properties of an alloy, the material analysis must be very precise and accurate. Fischer h …́‘•Ω•±½Α•)aI₯ΉΝΡΙΥ΅•ΉΡ́Ѽ½ΉΝ₯ΝΡ•ΉΡ±δ΅••ΠΡ‘₯Μ)‘•΅…Ή°…Ή΅½Ι”Έ)½΅Α±₯…Ρ₯½Έ₯Έ…Ή…±εΝ₯Ήœ…±Υ΅₯Ή₯Υ΄₯Μ)Ρ‘…Ёё”™±Υ½Ι•Ν•Ή”Ι…‘₯…Ρ₯½Έ½˜±₯‘Ρέ•₯‘Π)•±•΅•ΉΡ́±₯­”΅…Ή•Ν₯Υ΄°…±Υ΅₯Ή₯Υ΄…Ή)Ν₯±₯½Έ…Ι”…‰Ν½Ι‰•₯Έ…₯ΘΈΈ₯ΉΝΡΙΥ΅•ΉΠ)ΝՍ …́ё”₯͍‘•Θ`΅Ι…δaUXƒ Έ€άά́ݽɭ́₯Έ)„Ω…ΥΥ΄‘…΅‰•Θ…ΉΑΙ½Ω₯‘•Μ„Ή…ΡΥΙ…°)Ν½±ΥΡ₯½ΈΈ%Έ…‘‘₯Ρ₯½Έ°₯Ё₯́Α½ΝΝ₯‰±”ΡΌΑΙ½Ι…΄)΅Υ±Ρ₯Α±”΅•…ΝΥΙ•΅•ΉΠΝ•ΡΡ₯ΉΜέ₯Ρ‘₯Έ„Ν₯Ή±”)΅•…ΝΥΙ•΅•ΉΠε±”ΥΝ₯ΉœΡ‘”₯ΉΝΡΙΥ΅•ΉΣŠeΜ)]₯ΉQ4ƒ ΈΝ½™Ρέ…Ι”Έ½Θ•α…΅Α±”°₯Έ½Ι‘•Θ)ΡΌ…ΥΙ…Ρ•±δ‘•Ρ•ΠΡ‘”±₯‘ѕȁ•±•΅•ΉΡΜ°)„‘₯™™•Ι•ΉΠΝ•ΡΡ₯Ήœ₯́Ή••‘•Ρ‘…Έ™½Θ)‘•…Ω₯•Θ•±•΅•ΉΡΜΈUΝ₯ΉœΡ‘”΅Υ±Ρ₯Α±”)•α₯Ρ…Ρ₯½Έ΅•…ΝΥΙ•΅•ΉΠ΅½‘”°]₯ΉQ4ƒ Έ)…Έ½±±•ΠΡ‘”₯Ή™½Ι΅…Ρ₯½ΈΡ‘…Ёݽձ‰”)…₯Ή•έ₯Ρ ‰½Ρ Ν•ΡΡ₯ΉΜ…Ή…Ή…±εΝ”…±°)…±±½δ½ΉΝΡ₯ΡΥ•ΉΡ́₯Έ„Ν₯Ή±”΅•…ΝΥΙ•΅•ΉΠΈ)%ΈΝΥ΅΅…Ι䰁ѼΝ…™•Υ…ɐ……₯ΉΝЁͱ₯‘Π)‘•Ω₯…Ρ₯½ΉΜ₯ΈΡ‘”…±±½δ½΅Α½Ν₯Ρ₯½ΈΡ‘…Π)΅₯‘ЁɕΉ‘•ΘΡ‘”΅…Ρ•Ι₯…°ΥΉΥΝ…‰±”°)„ΑΙ•₯Ν”…ΉΙ•±₯…‰±”΅…Ρ•Ι₯…±Μ…Ή…±έ͕½˜)…±Υ΅₯Ή₯Υ΄…±±½έ₯́•ΝΝ•ΉΡ₯…°Έ)]₯Ρ €άΐε•…Ί•αΑ•Ι₯•Ή”₯ΈaI°₯͍‘•Θ)%ΉΝΡΙΥ΅•ΉΡ…Ρ₯½Έ₯ΈΡ‘”U,₯́ΙΥΉΉ₯ΉœΝ•΅₯Ή…ΙΜ)‘ΥΙ₯Ήœ)ΥΉ”μ₯ΈΡ‘”9½ΙΡ ½˜Ή±…Ή½Έ(ΔεΡ …Ή€ΘΑΡ …Ή₯ΈΡ‘”M½ΥΡ ½Έ€ΘέΡ …Ή(ΘαΡ )ΥΉ”ΈQ‘”Ν•΅₯Ή…Ίέ₯±°…‘‘Ι•Ν́ΝΑ•₯™₯Œ)½…Ρ₯ΉœΡ•ΝΡ₯Ήœ₯ΝΝՕ́•Ή½ΥΉΡ•Ι•₯ΈΡ‘”)…•Ι½ΝΑ…”ΝΥΑΑ±δ‘…₯Έ…Ή‘½ά`΅Ι…δ)™±Υ½Ι•Ν•Ή”…́„Ρ•‘Ή₯ΕΥ”…Έ‘•±ΐΈ