Results 51 to 60 of about 252,060 (304)

Tahap kesediaan pelajar menghadapi dunia pekerjaan dalam bidang perakaunan : kajian ke atas pelajar semester akhir Diploma Perakaunan di 5 buah politeknik [PDF]

, 2002
Objektif kajian kes ini adalah untuk mengenalpasti tahap kesediaan pelajar dalam usaha memasuki dunia pekeijaan, Borang soal selidik ini telah diedarkan kepada 169 orang pelajar semester akhir Diploma Perakaunan.
Mohd Kassim, Norlaili
core  

Austenitizing Time of Tool Steels for Cold Work

DENKI-SEIKO[ELECTRIC FURNACE STEEL], 1974
A study has been performed to clarify the effects of austenitizing time on hardness and toughness (bending strength) for cold work tool steels. A contour map of hardness and toughness was proposed in this paper and the following questions can be answered on this map:1) How to accomplish harmony of hardness and toughness?2) Which is better high ...
openaire   +2 more sources

Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter, Felix Drechsler, Till M. J. Stadtmüller, Cameliu Himcinschi, Christos G. Aneziris, Jens Kortus   +5 more
wiley   +1 more source

Thermomechanical Behavior of the HL-LHC 11 Tesla Nb3Sn Magnet Coil Constituents during Reaction Heat Treatment

, 2017
The knowledge of the temperature induced changes of the superconductor volume, and of the thermo-mechanical behaviour of the different coil and tooling materials is required for predicting the coil geometry and the stress distribution in the coil after ...
Finn, M., Lackner, F., Meyer, C., Rehmer, B., Savary, F., Scheuerlein, C.   +5 more
core   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

EXAMINATION OF THE PROPERTIES AND STRUCTURE OF TOOL STEEL EN 1.2379 DUE TO DIFFERENT HEAT TREATMENTS [PDF]

European Journal of Materials Science and Engineering, 2018
The hardness, microstructure and wear behavior of EN 1.2379 cold work tool steel were investigated in different heat treatment condition. In metal forming industry tools can be exposed to very complex and surface demanding conditions, which are the ...
László TÓTH
doaj  

Tool surface with a supporting plateau of hard particles for deep drawing of high alloy steel

MATEC Web of Conferences, 2018
Sheet metal forming normally requires the application of lubricants to protect the tool and the sheet against wear. The parts must be cleaned to remove the lubricants before joining and coating. This process step wastes energy and water resources. In the
Freiße Hannes, Seefeld Thomas
doaj   +1 more source

Softening Behavior of a Cold Work Tool Steel and High‐Boron Tool Steel Fabricated by Directed Energy Deposition

steel research international, 2023
Prolonging the life of hot stamping dies in the automotive industry is challenging. Surface modification is an effective way to improve the durability of the dies. In this study, two tool steel grades, one cold work tool steel (V4E) and one high‐boron tool steel (HBS), are deposited on a tool steel substrate using directed energy deposition, followed ...
Miwen Yuan, Lars Nyborg, Christos Oikonomou, Seshendra Karamchedu, Yicheng Fan, Libin Liu, Yu Cao   +6 more
openaire   +1 more source

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source

Directed energy deposition of chromium-molybdenum-vanadium cold work tool steel Vanadis 4 Extra©

Journal of Materials Research and Technology
Additive Manufacturing is a promising technology for the fabrication or repair of tools. However, the material portfolio is limited to materials with a decent weldability.
Dominic Bartels, Dimitrios Nikas, Raphaela März, Maximilian Marschall, Julian Schrauder, Marion Merklein, Aydin Şelte, Pavel Krakhmalev   +7 more
doaj   +1 more source