TY  - GEN
CY  -  UNIVERSITAS LAMPUNG
ID  - eprints31067
UR  - http://digilib.unila.ac.id/31067/
A1  - I KOMANG SUARIANDI,  1215021039
Y1  - 2018/03/29/
N2  - Perambatan retak fatik Stainlees Steel 304 yang diberi prestrain sebesar 1%, 3%
dan 5% menggunakan mesin MTS Landmark 100 kN pada temperatur ruang.
Hasil pengujian tarik menunjukkan efek prestrain meningkatkan kekuatan
mekaniknya seperti tegangan luluh dan tegangan maksimumnya, namun keuletan
baja menurun. Laju perambatan retak fatik (da/dN) Stainlees Steel 304 yang tidak
diprestrain da/dN=6,17×10-9?K1,323, prestrain 1% da/dN =6,28×10-9?K1,253,
prestrain 3% da/dN=8,18×10-9?K1,181 dan prestrain 5% da/dN=22,52×10-
9?K0,825. Berdasarkan nilai laju perambatan retak fatik, prestrain menurunkan laju
perambatan retak fatik Stainlees Steel 304. Prestrain yang diberikan pada
Stainlees Steel 304 merubah orientasi dan ukuran butirnya. Prestrain
menyebabkan ukuran butir mengecil, spesimen tanpa prestrain memiliki ukuran
diameter butir rata-rata dbs=0,0997 mm, prestrain 1% d1%=0,0651 mm, prestrain
3% d3%=0,0539 mm dan prestrain 5% d5%=0,0509 mm. Ukuran butir mengecil
seiring dengan besarnya prestrain yang berkontribusi menurunan laju perambaran
retak fatiknya.
Kata Kunci : stainlees steel 304, prestrain, retak fatik, ukuran butir

ABSTRACT


Fatigue crack propagation Stainless Steel 304 is given prestrained 1%, 3% and 5%
used the Landmark MTS 100 kN at room temperature. The tensile test results
show the prestrain effect increases the mechanical strength such as yield strength
and ultimate tensile strength, but the steel toughness was decreases. Fatigue crack
propagation rate (da / dN) Stainlees Steel 304 which is not prestrained
da/dN=6,17×10-9?K1,323, prestrain 1% da/dN =6,28×10-9?K1,253, prestrain 3%
da/dN=8,18×10-9?K1,181 and prestrain 5% da/dN=22,52×10-9?K0,825. Based on the
rate of fatigue crack propagation, prestrain decreases the rate of fatigue crack
propagation of Stainlees Steel 304. The prestrain given to Stainless Steel 304 for
changed the orientation and size of the grains. Prestrain causes the grain size to
decline, specimen without prestrain has average diameter size dbs=0,0997 mm,
prestrain 1% d1%=0,0651 mm, prestrain 3% d3%=0,0539 mm dan prestrain 5%
d5%=0,0509 mm. The size of the grains has declined with the amount of prestrain
given which contributed to the decreasing rate of fatigue crack growth.
Keywords: stainlees steel 304, prestrain, fatigue crack growth, grain size.
PB  - FAKULTAS TEKNIK
TI  - EFEK PRESTRAIN PADA STAINLEES STEEL 304 TERHADAP
PERAMBATAN RETAK FATIK
AV  - restricted
ER  -