Non Ferrous alloys
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Non Ferrous alloys MSE 528 PowerPoint PPT Presentation


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Non Ferrous alloys MSE 528. Mg alloys for automotive. Copper and its Alloys. Beta stabilizer. Ti alloy. Alpha stabilizers: C, O, N and Al Beta Stabilizers: Cr, Fe, Pd, Co, Mn, H, V, Mo, Ta, Nb Alpha alloys: Ti-5Al-2.5Sn, Ti-4al-1Mo Beta alloys: Beta 21S (13%Mo),

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Non Ferrous alloys MSE 528

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Mg alloys for automotive

Non Ferrous alloys

MSE 528


Mg alloys for automotive

Mg alloys for automotive


Copper and its alloys

Copper and its Alloys


Beta stabilizer

Beta stabilizer


Ti alloy

Ti alloy

  • Alpha stabilizers: C, O, N and Al

  • Beta Stabilizers: Cr, Fe, Pd, Co, Mn, H, V, Mo, Ta, Nb

  • Alpha alloys: Ti-5Al-2.5Sn, Ti-4al-1Mo

  • Beta alloys: Beta 21S (13%Mo),

  • Alpha + Beta alloys: Ti-6Al-4V,

  • ELI: extra low level Interstitials


Tixal

TixAl


Precipitation hardening

PRECIPITATION HARDENING

• Particles impede dislocations.

• Ex: Al-Cu system

• Procedure:

--Pt A: solution heat treat

(get a solid solution)

--Pt B: quench to room temp.

--Pt C: reheat to nucleate

small q crystals within

a crystals.

• Other precipitation

systems:

• Cu-Be

• Cu-Sn

• Mg-Al

Adapted from Fig. 11.22, Callister 6e. (Fig. 11.22 adapted from J.L. Murray, International Metals Review30, p.5, 1985.)

Adapted from Fig. 11.20, Callister 6e.

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Precipitate effect on ts el

PRECIPITATE EFFECT ON TS, %EL

• 2014 Al Alloy:

• TS peaks with

precipitation time.

• Increasing T accelerates

process.

• %EL reaches minimum

with precipitation time.

Adapted from Fig. 11.25 (a) and (b), Callister 6e. (Fig. 11.25 adapted from Metals Handbook: Properties and Selection: Nonferrous Alloys and Pure Metals, Vol. 2, 9th ed., H. Baker (Managing Ed.), American Society for Metals, 1979. p. 41.)

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Precipitation strengthening

PRECIPITATION STRENGTHENING

• Hard precipitates are difficult to shear.

Ex: Ceramics in metals (SiC in Iron or Aluminum).

• Result:

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Application precipitation strengthening

APPLICATION:PRECIPITATION STRENGTHENING

1.5mm

• Internal wing structure on Boeing 767

Adapted from Fig. 11.0, Callister 5e.

(Fig. 11.0 is courtesy of G.H. Narayanan and A.G. Miller, Boeing Commercial Airplane Company.)

• Aluminum is strengthened with precipitates formed

by alloying.

Adapted from Fig. 11.24, Callister 6e.

(Fig. 11.24 is courtesy of G.H. Narayanan and A.G. Miller, Boeing Commercial Airplane Company.)

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