The structure of a general materials genome approach to the design of new steel grades for specific properties

• Autorzy: Xu W. , LU Q. , Xu X. , van der Zwaag S.

Warianty tytułu

PL

Struktura ogólnego podejścia materiałowego do projektowania nowych gatunków stali o specjalnych własnościach

• Języki publikacji: EN

Abstrakty

EN

In this work we review and reformulate a general alloy design methodology based on thermodynamic and kinetic principles, employing the genetic algorithm as the optimization scheme. The new approach relies on two key concepts: the ‘translator’ and the ‘creator’. The ‘translator’ is the conversion of the desired (thermo-)mechanical properties into required microstructures using known microstructure-property relationships. The ‘creator’ translates quantifiable microstructural parameters into metallurgical and economical parameters, i.e. composition, heat treatment parameter and cost, again employing established metallurgical principles. In the case of well defined ‘translator’ and ‘creator’ functions the model allows simultaneous, human intervention free optimization of alloy composition and key heat treatment parameters, i.e., austenitization temperatures and ageing temperatures, so as to fulfill multiple design criteria and eventually to achieve the desired microstructure. The elementary version of the model, not defining the ‘translator’ or ‘creator’ modules explicitly has applied to the design of ultra high strength (UHS) stainless steel and was validated by experiments on prototype alloys. The model was subsequently extended to take into account the alloying cost by adding a cost factor to various alloying elements, and is shown to provide valuable guidelines to the design and modification of alloy compositions and has the capacity to optimize strength and material cost in an integrated manner. In this manuscript the new conceptual approach to alloy design is reformulated in a more generic and abstract manner and new extensions of the model to the design of high temperature resistant steels (both creep steels and fire resistant steels) and abrasion resistant steels are discussed, and some preliminary results are shown.

PL

W pracy omówiono metodę projektowania stopów wykorzystującą zasady termodynamiki i kinetyki i stosując algorytmy genetyczne w procedurze optymalizacyjnej. Metoda polega na zastosowaniu dwóch głównych pojęć: translatora i kreatora. Translator jest zamianą wymaganych własności termomechanicznych na wymaganą mikrostrukturę, wykorzystując znane zależności między tymi parametrami. Kreator stosuje ustalone zasady metalurgiczne i zamienia ilościowe parametry mikrostruktury w parametry metalurgiczne i ekonomiczne, tzn. skład chemiczny, parametry obróbki cieplnej i koszty. W przypadku dobrze zdefiniowanych funkcji translatora i kreatora model pozwala na równoczesną optymalizację, z interwencją człowieka,dla składu chemicznego oraz dla parametrów obróbki cieplnej, tzn temperatury austenityzacji i temperatury starzenia. W ten sposób spełnione są różne kryteria projektowania i ostatecznie uzyskiwana jest wymagana mikrostruktura. Podstawowa wersja modelu, która nie definiuje modułów translatora i kreatora w sposób jawny, została zastosowana do projektowania stali nierdzewnych o podwyższonej wytrzymałości (ang. Ultra High Strength - UHS). Otrzymane wyniki zostały zweryfikowane doświadczalnie. Następnie model został rozszerzony i uwzględniono koszt dodatków stopowych poprzez wprowadzenie czynnika kosztów dla różnych pierwiastków stopowych. W ten sposób uzyskano cenne wskazówki dla projektowania i modyfikacji składu chemicznego i możliwość optymalizacji w sposób zintegrowany wytrzymałości materiału i kosztów jego wytwarzania. W niniejszej pracy to podejście zostało dalej uogólnione i stworzono nowe rozszerzenie modelu dla projektowania stali żaroodpornych, stali odpornych na pełzanie w wysokich temperaturach i stali odpornych na zużycie ścierne. Zamieszczone zostały wstępne wyniki uzyskane z nowej wersji modelu.

Słowa kluczowe

EN

alloy design; genetic algorithm; ultra high strength (UHS) steels; creep resistant steels; abrasion resistant; steels; material genome initiative

• Wydawca: Wydawnictwa AGH
• Czasopismo: Computer Methods in Materials Science
• Rocznik: 2013
• Tom: Vol. 13, No. 3
• Strony: 382--394
• Opis fizyczny: Bibliogr. 38 poz., rys.

Twórcy

autor

Xu W.

• Novel Aerospace Materials group, Faculty of Aerospace Engineering, Delft University of Technology, 2628HS, Delft, The Netherlands

autor

LU Q.

• Novel Aerospace Materials group, Faculty of Aerospace Engineering, Delft University of Technology, 2628HS, Delft, The Netherlands

autor

Xu X.

• Novel Aerospace Materials group, Faculty of Aerospace Engineering, Delft University of Technology, 2628HS, Delft, The Netherlands

autor

van der Zwaag S.

• Novel Aerospace Materials group, Faculty of Aerospace Engineering, Delft University of Technology, 2628HS, Delft, The Netherlands

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