Uji Tarik Uji Kekerasan Uji impact Uji...
Transcript of Uji Tarik Uji Kekerasan Uji impact Uji...
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UJI BAHAN TEKNIK
Uji Tarik Uji Kekerasan
Uji impactUji Metalografy
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UJI TARIK BAHAN
• DAPAT MENGETAHUI KEKUATAN TARIK MAKS
• KEKUATAN LULUH (YIELD)
• KEULETAN
• RAPUH/GETAS
• KEKAKUAN
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GAMBAR DIAGRAM DATA UJI TARIK
• DIAGRAM BEBAN DAN PERPANJANGAN
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Diagram Tegangan Regangan
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Tabel dimensi spesimen uji tarik
A(mm2)
do
(mm)Lo
(mm)Lc
(mm)
r (mm)
Logam di-rolLogam di-
cor
200 15,96 80 88 15 30
150 13,82 69 76 13 26
100 11,28 56 62 10 20
50 7,98 40 44 8 16
25 5,64 28 31 5 10
12,5 3,99 20 21 4 8
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Ukuran Spesimen untuk bahan rata
b(mm)
Lo
(mm)Lc
(mm)Lt
(mm)r
(mm)
25 100 125 300 25
12,5 50 63 200 25
6 24 30 100 12
3 12 15 50 6
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BENTUK SPESIMEN BULAT DAN SEGI EMPAT
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Tabel kekuatan tarik
Bahan Modulus Young (kN/mm2) Kekuatan Tarik (N/mm2)
Aluminium paduan 70 100-550
Tembaga paduan 110 200-1300
Magnesium paduan 45 150-350
Nikel paduan 200 400-1600
Titanium paduan 100 400-1600
Seng paduan 100 200-350
Besi tuang kelabu 100 150-400
Baja karbon rendah 200 350-500
Feritik Stainless steel 200 500-600
Martensitik Stainless steel 200 450-1300
Polyethylene, low 0,2 8-16
Polyethylene, high 0,9 22-38
PVC 2,7 52-58
Polystyrene 3,3 35-60
Nilon 6 2,2 70-90
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LEMBAR DATA
DATA dan PERHITUNGANBENDA UJI
SILINDRIS RATADiameter benda uji (d) (mm)Lebar (w) dan Tebal (t) (mm)
Luas area•Awal, Ao (mm2)•Akhir, Af (mm2)Panjang ukur•Awal, Lo (mm)•Akhir, Lf (mm)
Beban luluh , N
Beban maksimum, N
Beban putus, N
Kekuatan Luluh, N/mm2
UTS, N/mm2
Kekuatan Putus, N/mm2
Elongasi, %
X. LEMBAR DATA
Mesin Uji Tarik : TarnoGrocki
Bahan benda uji : .......................
Standar : ............
Crosshead speed : ...............mm/detik
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LEMBAR DATA UNTUK PENCATATAN
PENCATATAN PERHITUNGAN
P (N) ΔL(mm) σ(N/mm2) ε(mm/mm)
DATA PENCATATAN BEBAN DAN PERTAMBAHAN PANJANG
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UJI KEKERASAN
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UJI KEKERASAN METODE BRINELL
)(
2
22 dDDD
PBHN
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UJI KEKERASAN METODE VICKERS
2
854,1
d
PVHN
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UJI KEKERASAN METODE ROCKWELL
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TABEL ROCKWELL
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KONVERSI KEKERASAN
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KEKERASAN MATERIAL
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DATA UJI KEKERASAN BRINELL
No.Benda
UjiKondisi
pengujian
In-den-tasi
Jejak Indentasi (mm)BHN Catatan
d1 d2 dave
1D= mmP= kgt= detik
1
2
3
4
5
2D= mmP= kgt= detik
1
2
3
4
5
3D= mmP= kgt= detik
1
2
3
4
5
4D= mmP= kgt= detik
1
2
3
4
LEMBAR DATA
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DATA UJI UNTUK HRC
No. Benda Uji Kondisi pengujianIn-
den-tasi
HRC Catatan
1P= kgt= detik
1
2
3
4
5
2P= kgt= detik
1
2
3
4
5
3P= kgt= detik
1
2
3
4
5
4P= kgt= detik
1
2
3
4
5
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UJI IMPACT
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BENTUK STANDAR SPESIMEN IMPACT
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TABEL KEKUATAN IMPACT
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MACAM METODE IMPACT
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PENCATATAN DATA UJI IMPACT
No.Sudut awal
(°)Sudut Akhir
(°)Ketinggian
Awal h1 (m)Ketinggian
Akhir h2 (m)Energi Impak
EI (Joule)
No.T
(oC)a
(mm)b
(mm)A
(mm2)E
(Joule)HI
(Joule/mm2)
Bentuk Patahan
Deskripsi Patahan
1
2
3
Sketsa benda uji:
Bahan benda uji: .......................
Metode : Charpy
Beban: ...............
No.Sudut awal
(°)Sudut Akhir
(°)Ketinggian
Awal h1 (m)Ketinggian
Akhir h2 (m)Energi Impak EI
(Joule)
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PENUTUP
TERIMA KASIH