{"id":{"repo_id":"aachen","oai_identifier":"oai:publications.rwth-aachen.de:61490"},"canonical_url":"https://search.dev.ndltd.org/etd/aachen/oai:publications.rwth-aachen.de:61490","repository":{"repo_id":"aachen","name":"RWTH Aachen University","base_url":"https://publications.rwth-aachen.de/oai2d"},"display":{"title":"Thermochemische und kinetische Modellierung zur Legierungsauswahl mehrphasiger Systeme für das Thixoforming und zur Optimierung ihrer Formgebungsprozesse","abstract":"In the present work the thermochemical calculations for the selection of alloys and for the process optimisation of the semi-solid processing (SSP) were carried out. The available thermodynamic data for aluminium systems were extended. Two quaternary systems Al-Fe-Mn-Si and Al-Cu-Li-Mg were assessed and optimized. Based on the thermochemical simulation, the conventional aluminium alloys A356, A319 and AA6082 were evaluated regarding to the requirements of SSP. Further investigation on alloy the quaternary system Al-Cu-Li-Mg was carried out to develop an alloy adapted to SSP. For this task a new evaluation parameter, the Thixointerval DeltaT40-60 (or DeltaT20-40 ) was introduced additionally to the well-known parameters. With this new parameter it is possible to adjust the material to SSP generally, as well as to proof the requirements for the different modifications of SSP. Diffusion calculations were accomplished for the simulation of solidification and heat treatment as well as isotherm holding of steel grades 100Cr6, HS6-5-2 and X210CrW12. From the simulations the development of liquid fraction during the inductive heat treatment and isotherm holding of these steel grades were determined. On the basis of the determined information from the simulation the possible liquid fraction profiles in a billet of the steel grade HS6-5-2 were computed, for further optimization of technological processes. The entire simulation shows that the chemical and thermal homogeneity of the semi-solid materials and the exact temperature attitude during the SSP are of greatest importance for a safe process cycle of SSP.","abstract_html":"In the present work the thermochemical calculations for the selection of alloys and for the process optimisation of the semi-solid processing (SSP) were carried out. The available thermodynamic data for aluminium systems were extended. Two quaternary systems Al-Fe-Mn-Si and Al-Cu-Li-Mg were assessed and optimized. Based on the thermochemical simulation, the conventional aluminium alloys A356, A319 and AA6082 were evaluated regarding to the requirements of SSP. Further investigation on alloy the quaternary system Al-Cu-Li-Mg was carried out to develop an alloy adapted to SSP. For this task a new evaluation parameter, the Thixointerval DeltaT40-60 (or DeltaT20-40 ) was introduced additionally to the well-known parameters. With this new parameter it is possible to adjust the material to SSP generally, as well as to proof the requirements for the different modifications of SSP. Diffusion calculations were accomplished for the simulation of solidification and heat treatment as well as isotherm holding of steel grades 100Cr6, HS6-5-2 and X210CrW12. From the simulations the development of liquid fraction during the inductive heat treatment and isotherm holding of these steel grades were determined. On the basis of the determined information from the simulation the possible liquid fraction profiles in a billet of the steel grade HS6-5-2 were computed, for further optimization of technological processes. The entire simulation shows that the chemical and thermal homogeneity of the semi-solid materials and the exact temperature attitude during the SSP are of greatest importance for a safe process cycle of SSP.","abstract_has_math":false,"creators":["Balitchev, Evgueni"],"institution":"Publikationsserver der RWTH Aachen University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Neuschütz, Dieter"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2004,"date_issued":"2004","date_published":"2004","updated_at":"2026-07-30T19:43:10Z","subjects":["info:eu-repo/classification/ddc/620","Aluminiumlegierung","Quaternäre Legierung","Thermochemie","Numerisches Verfahren","Stahl","Thixoforming","Werkstoffwahl","Prozessoptimierung","Ingenieurwissenschaften","Legierungsauswahl","Simulation"],"languages":["ger"],"rights":["info:eu-repo/semantics/openAccess"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123151%22"],"render_values":[{"text":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123151%22","href":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123151%22","code":true}]}]},"links":{"outbound_url":"https://publications.rwth-aachen.de/record/61490","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Neuschütz, Dieter"]},{"key":"dc:creator","label":"Author","values":["Balitchev, Evgueni"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:coverage","label":"Dc Coverage","values":["DE"]},{"key":"dc:date","label":"Dc Date","values":["2004"]},{"key":"dc:publisher","label":"Institution","values":["Publikationsserver der RWTH Aachen University"]},{"key":"dc:relation","label":"Dc Relation","values":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-8051"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["info:eu-repo/classification/ddc/620","Aluminiumlegierung","Quaternäre Legierung","Thermochemie","Numerisches Verfahren","Stahl","Thixoforming","Werkstoffwahl","Prozessoptimierung","Ingenieurwissenschaften","Legierungsauswahl","Simulation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["ger"]},{"key":"dc:rights","label":"Dc Rights","values":["info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/record/61490","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123151%22"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["In the present work the thermochemical calculations for the selection of alloys and for the process optimisation of the semi-solid processing (SSP) were carried out. The available thermodynamic data for aluminium systems were extended. Two quaternary systems Al-Fe-Mn-Si and Al-Cu-Li-Mg were assessed and optimized. Based on the thermochemical simulation, the conventional aluminium alloys A356, A319 and AA6082 were evaluated regarding to the requirements of SSP. Further investigation on alloy the quaternary system Al-Cu-Li-Mg was carried out to develop an alloy adapted to SSP. For this task a new evaluation parameter, the Thixointerval DeltaT40-60 (or DeltaT20-40 ) was introduced additionally to the well-known parameters. With this new parameter it is possible to adjust the material to SSP generally, as well as to proof the requirements for the different modifications of SSP. Diffusion calculations were accomplished for the simulation of solidification and heat treatment as well as isotherm holding of steel grades 100Cr6, HS6-5-2 and X210CrW12. From the simulations the development of liquid fraction during the inductive heat treatment and isotherm holding of these steel grades were determined. On the basis of the determined information from the simulation the possible liquid fraction profiles in a billet of the steel grade HS6-5-2 were computed, for further optimization of technological processes. The entire simulation shows that the chemical and thermal homogeneity of the semi-solid materials and the exact temperature attitude during the SSP are of greatest importance for a safe process cycle of SSP."]},{"key":"dc:source","label":"Dc Source","values":["Aachen : Publikationsserver der RWTH Aachen University II, 103 S. : Ill., graph. Darst. (2004). = Aachen, Techn. Hochsch., Diss., 2004"]},{"key":"dc:title","label":"Title","values":["Thermochemische und kinetische Modellierung zur Legierungsauswahl mehrphasiger Systeme für das Thixoforming und zur Optimierung ihrer Formgebungsprozesse"]}]}],"canonical_facts":{"dc:contributor":["Neuschütz, Dieter"],"dc:coverage":["DE"],"dc:creator":["Balitchev, Evgueni"],"dc:date":["2004"],"dc:description":["In the present work the thermochemical calculations for the selection of alloys and for the process optimisation of the semi-solid processing (SSP) were carried out. The available thermodynamic data for aluminium systems were extended. Two quaternary systems Al-Fe-Mn-Si and Al-Cu-Li-Mg were assessed and optimized. Based on the thermochemical simulation, the conventional aluminium alloys A356, A319 and AA6082 were evaluated regarding to the requirements of SSP. Further investigation on alloy the quaternary system Al-Cu-Li-Mg was carried out to develop an alloy adapted to SSP. For this task a new evaluation parameter, the Thixointerval DeltaT40-60 (or DeltaT20-40 ) was introduced additionally to the well-known parameters. With this new parameter it is possible to adjust the material to SSP generally, as well as to proof the requirements for the different modifications of SSP. Diffusion calculations were accomplished for the simulation of solidification and heat treatment as well as isotherm holding of steel grades 100Cr6, HS6-5-2 and X210CrW12. From the simulations the development of liquid fraction during the inductive heat treatment and isotherm holding of these steel grades were determined. On the basis of the determined information from the simulation the possible liquid fraction profiles in a billet of the steel grade HS6-5-2 were computed, for further optimization of technological processes. The entire simulation shows that the chemical and thermal homogeneity of the semi-solid materials and the exact temperature attitude during the SSP are of greatest importance for a safe process cycle of SSP."],"dc:identifier":["https://publications.rwth-aachen.de/record/61490","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123151%22"],"dc:language":["ger"],"dc:publisher":["Publikationsserver der RWTH Aachen University"],"dc:relation":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-8051"],"dc:rights":["info:eu-repo/semantics/openAccess"],"dc:source":["Aachen : Publikationsserver der RWTH Aachen University II, 103 S. : Ill., graph. Darst. (2004). = Aachen, Techn. 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