Abstract
In this diploma thesis the AerMet® 100 alloy was investigated. This alloy has a chemical composition of Fe-13,4%Co- 11,1%Ni- 3,1%Cr- 1,2%Mo- 0,23%C (mass per cent) and belongs to the group of the “ Secondary Hardening High Co-Ni Steels“. The microstructure consists of a predominantly nickel-martensitic matrix, in which (Cr,Mo)2C carbides are formed through aging. The special properties of this alloy are fracture toughness values of more than 120 MPa√m with corresponding tensile strengths of 2000 MPa. The aim of this work was to characterize the constitution, the structure and the mechanical properties of the AerMet® 100 alloy. Therefore test-alloys with different cobalt content were produced. With these test-alloys the influence of the cobalt content on the hardness and on the structure depending on the aging temperature was assessed. Further the AerMet® 100 alloy itself was analysed regarding the structure. Additionally, to investigate the mechanical properties of the AerMet® 100 alloy tensile, notch impact and fracture toughness tests were performed. The results were compared with the mechanical properties of a Maraging Steel of the trademark Boehler W720 and with the literature values for the AerMet® 100 alloy.
Translated title of the contribution | Microstructure and mechanical properties of the AerMet® 100 alloy |
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Original language | German |
Qualification | Dipl.-Ing. |
Supervisors/Advisors |
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Award date | 14 Dec 2012 |
Publication status | Published - 2012 |
Bibliographical note
embargoed until 21-09-2017Keywords
- secondary hardening steel
- nickel martensite
- austenite
- mechanical properties
- microstructure