Open AccessAnalysis of the Effect of Stop Drilled Hole Diameter Variation on Fatigue Resistance in Medium Carbon Steel DIN HQ 705
Author(s) -
Hendri Chandra,
V. Lestari
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/810/1/012016
Subject(s) - materials science , drilling , fracture (geology) , carbon steel , composite material , intergranular corrosion , compact tension specimen , metallurgy , structural engineering , fracture mechanics , crack closure , corrosion , crack growth resistance curve , engineering
Steel has an important role in the industrial world where many machine component designs use these materials. The mechanical properties possessed by this material are quite capable of various applications in the field in a variety of applications. One application of steel is in the gear and shaft. These gears and shafts use HQ 705 material which is a medium carbon steel with a carbon content of 0.30 - 0.38%. This research was carried out by making a notch on one side of the specimen, then creating an initial crack at the end of the notch with a fatigue machine, to prevent crack propagation, a stop drilled hole was made at the end of the initial crack with variations of 2 mm, 2.5 mm respectively. and 3 mm. Furthermore, this specimen was tested by fatigue test to test the fatigue resistance of each specimen. The results obtained are that specimens with stop drilled holes have longer cycle times compared to specimens without stop drilled holes. With the variation of the stop drilled hole (SDH), the result is that the stop drilled hole with a diameter of 2 mm is easily broken compared to the stop drilled with a diameter of 3 mm. From the fracture surface seen with SEM, it can be seen that the type of crack that occurs in the fracture is an intergranular crack type.