KEKERASAN DAN KEKUATAN BENDING KOMPOSIT ALUMINIUM YANG DIPERKUAT SERBUK BESI PRODUK PROSES STIR CASTING - Diponegoro University | Institutional Repository (UNDIP-IR)

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LAMPIRAN

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LAMPIRAN

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Tabel nilai kekerasan Rockwell (HRB) Al/Fe berdasarkan variasi F e 15% dengan

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Tabel pengujian bendingAl/Fe temperatur tuang 700°C

no. Perlakuan d tebal (mm)

b lebar (mm)

L pjg (mm)

P (N) S (MPa)

1 Fe 5% 3,0 4,0 45 218,7 205,03

2 Fe 10% 3,0 4,0 45 96,1 90,09

3 Fe 15% 3,0 4,0 45 180,6 169,31

P (N) � − � ² S (MPa) − ²

Fe 5% 218.7 2869.388 205.03 2522.048

Fe 10% 96.1 4765.601 90.09 4188.678

Fe 15% 180.6 239.2178 169.31 210.25

� =

165.1333 Σ = 2624.736

=

154.81 Σ = 2306.992

Standar Deviasi Skala Tegangan Lentur - S (δ MPa)

δ MPa = − ² �

�=1

� −1

1 2

δ MPa = 2306.992 3−1

1 2

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b lebar (mm)

L pjg (mm)

P (N) S (MPa)

1 Fe 5% 3,0 4,0 45 269.8 252.94

2 Fe 10% 3,0 4,0 45 158.6 148.69

3 Fe 15% 3,0 4,0 45 37.24 34.1

P (N) � − � ² S (MPa) − ²

Fe 5% 269.8 13130,1 252.94 11598,57

Fe 10% 158.6 11.46951 148.69 11.87951

Fe 15% 37.24 13917.71 34.1 12352.84

� =

155.2133

Σ = 9019.76 =

145.2433 Σ = 7987.764

δ MPa = − ² �

�=1

� −1

1 2

δ MPa = 7987.764 3−1

1 2

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b lebar (mm)

L pjg (mm)

P (N) S (MPa)

1 Fe 5% 3,0 4,0 45 217 203.44

2 Fe 10% 3,0 4,0 45 160.4 150.38

3 Fe 15% 3,0 4,0 45 162.2 152.06

.

P (N) � − � ² S (MPa) − ²

Fe 5% 217 1378.884 203.44 1211.968

Fe 10% 160.4 378.9511 150.38 332.9408

Fe 15% 162.2 312.1111 152.06 274.4544

� =

179.8667 Σ = 689.9822

=

168.6267 Σ = 606.4545

δ MPa = − ² �

�=1

� −1

1 2

δ MPa = 606.4545 3−1

1 2

δ MPa = 17,41342

₌

3 ��

4 ��2

Dimana :

S = Tegangan Lentur (MPa) P = Beban / Load (N)

L = Panjang Span / Support Span (mm) b = Lebar / Width (mm)