Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
The geological age of the outcrop along the Prataan River were interpreted based on calcareous Nannofossil and Foraminiferal assemblages. The lithological unit recognized in this area, from oldest to youngest are Ngrayong-Bulu, Wonocolo, Ledok and Mundu Formations. In this study, 23 samples of 15 sample locality were analyzed; 23 species of calcareous Nannofossils and 20 species of planktic Foraminifera were identified. Based on calcareous Nannofossil, the Ngrayong-Bulu, Wonocolo, Ledok-Mundu Formations are NN7 or middle Miocene, NN10 or late Miocene, NN14-NN15 or early Pliocene in age, respectively. Based on planktic Foraminifera, the Wonocolo is N16 or late Miocene, and Ledok-Mundu Formations is N18-N19 or Pliocene in age. Correlating the section's composite column of Prataan River with well TPN-1, revealing that the middle-late Miocene unconformity and the late Miocene-early Pliocene unconformity discovered in the well are predicted to be existed in the Prataan River outcrops.
This investigation characterizes the fracture behavior of a dissimilar weldment comprising E2209 duplex stainless steel as a weld metal and the low alloy steel 20MnMoNi55 as a base metal. The microstructure of the base metal consisted of bainitic structure while the weld metal comprised ferrite and austenite phases. Instrumented impact testing was employed to determine the fracture behavior at temperatures between -196 and 300 C. The results showed that the base metal and the duplex weldment exhibited distinct ductile to brittle fracture transition behavior. The base metal displayed much higher upper shelf energy (USE) level than that of the duplex weldment (130 vs. 80 Joule), designating superior resistance to ductile fracture at high test temperatures. By contrast, the duplex weldment exhibited a greater deal of resistance to brittle fracture at low test temperatures. That was manifested by a lower value of the ductile to brittle transition temperature (DBTT) of the duplex weldment against that of the base metal (-75 vs. 25 C). In addition, the brittleness temperature (the temperature at which complete brittle fracture features prevail) was much less for the duplex weldment than the base metal (-100 vs. -25 C). Furthermore, the cleavage fracture stress as computed from the dynamic yield strength values determined at the brittleness temperature gave values of 2650 and 1890MPa for the duplex weldment and the base metal, respectively. The results were substantiated by the load–time traces, derived from the instrumented impact tests at different temperatures as well as the pertinent fracture surface morphologies.
