Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Oliver Hering"'
Publikováno v:
Metals, Vol 11, Iss 1, p 32 (2020)
In this paper a process sequence, that uses forward rod extrusion with cold forged C15 steel cup billets to produce lightweight shafts, is presented. The steel cup billets feature either a lightweight magnesium alloy core or a granular medium core th
Externí odkaz:
https://doaj.org/article/e6c3051725b34c29941e83ff1262b7ce
Publikováno v:
PLoS Genetics, Vol 3, Iss 12, p e229 (2007)
The basal transcription apparatus of archaea is well characterized. However, much less is known about the mechanisms of transcription termination and translation initation. Recently, experimental determination of the 5'-ends of ten transcripts from P
Externí odkaz:
https://doaj.org/article/735b28a332e242b5ac56894c943e6c9e
Publikováno v:
Journal of Manufacturing Science and Engineering. 145
It is investigated to what extent the evolution of ductile damage in cold forging can be controlled without changing the geometry of the produced part. Besides the effects of strain hardening and residual stresses, damage, which is the nucleation, gr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4187ceb75c35e2241d078f1b3d63eec
https://doi.org/10.1115/1.4056266
https://doi.org/10.1115/1.4056266
Publikováno v:
International Journal of Precision Engineering and Manufacturing-Green Technology. 9:1035-1048
Bent components and deep drawn cups are produced by direct usage of aluminium chips without melting following a new process chain: hot extrusion of aluminium chips to a cylindrical open profile, flattening, subsequent rolling and bending or deep draw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da28978e4ad057f628b7bb2eb86f469a
https://doi.org/10.1007/s40684-021-00395-8
https://doi.org/10.1007/s40684-021-00395-8
Publikováno v:
International Journal of Material Forming. 14:1463-1481
The influence of anisotropic work-hardening on the component properties and process forces in cold forging is investigated. The focus is on the material behaviour exhibited after strain path reversals. The work-hardening of three steels is characteri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d595b930990f2179a69b295ddcf212a
https://doi.org/10.1007/s12289-021-01641-9
https://doi.org/10.1007/s12289-021-01641-9
Publikováno v:
CIRP Annals. 70:247-250
Metal sheets are forward extruded at large plastic strains up to 1.6. The sheet specimens are placed between two half-cylindrical billets and cold-extruded collectively. While extruding the sheets, their central zone is plastically deformed nearly ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bcb7910eb854870e65bec8509ad369d9
https://doi.org/10.1016/j.cirp.2021.03.023
https://doi.org/10.1016/j.cirp.2021.03.023
Autor:
Frank Walther, Kerstin Möhring, Oliver Hering, Alexander Schowtjak, A. Erman Tekkaya, Robin Schulte, Kai Langenfeld, Richard Ostwald, Jörn Mosler, Till Clausmeyer
Publikováno v:
Production Engineering. 14:115-121
This contribution deals with the influence of anisotropic material degradation (damage) within numerical simulations of cold forging. For that purpose, two constitutive frameworks for modeling ductile damage are presented: an isotropic and an anisotr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de953af38de75b127e19169e0a85113e
https://doi.org/10.1007/s11740-019-00942-y
https://doi.org/10.1007/s11740-019-00942-y
Autor:
Tanmoy Rakshit, Johannes Gebhard, Oliver Napierala, Felix Kolpak, André Schulze, Oliver Hering, A. Erman Tekkaya
Composite components combine the benefits of different materials, leading to improved product properties, enhanced resource- and energy efficiency and widening the product spectrum. Draw-forging is the unique combination of deep-drawing and cold forg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89a208c957c9f4a26079c2b75da5527b
Autor:
Till Clausmeyer, Robin Schulte, Gerhard Hirt, Johannes Lohmar, Oliver Hering, Alexander Schowtjak, Shuhan Wang, A. Erman Tekkaya, Richard Ostwald
Publikováno v:
Production Engineering. 14:33-41
Damage in the sense of voids influences material as well as product properties and thus is important for the performance of formed components. In this work, the influence of caliber rolling prior to a cold forward extrusion process in terms of damage
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a96fdaa8320bfecbc069f3e116efc683
https://doi.org/10.1007/s11740-019-00935-x
https://doi.org/10.1007/s11740-019-00935-x
Publikováno v:
International Journal of Material Forming. 13:1003-1014
In addition to strain hardening and residual stress, damage influences the product performance of forward rod extruded parts. Damage is usually neglected and difficult to quantify. The evolution of ductile damage in metal forming is closely correlate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80b09fb0a5d94fe049b78a95e0f608bf
https://doi.org/10.1007/s12289-019-01525-z
https://doi.org/10.1007/s12289-019-01525-z