Thermische Analyse von ausscheidungsgehärteten Stählen

Translated title of the contribution: Thermal analysis of precipitation hardening steels

Michael Schober

Research output: ThesisDiploma Thesis


The base line for a reaction peak of a DTA-curve is used to calculate the absorbed (endothermic) or emitted (exothermic) energy. Therefore, the correct base line construction is of vital importance. A DTA-curve in general represents the heat capacity of the measured material. The reaction energy is the area under the measured peak and the corresponded base line. The aim of the diploma thesis is to verify the construction of base lines in irreversible reactions of DTA-curves. For these purpose the two secondary hardening steels, S903 and the maraging steel Corrax, which exhibit complex precipitation reactions were investigated. Additional to the DTA-measurements dilatometer curves were recorded to separate different reactions occurring in the materials investigated. To characterise each reaction peak of the DTA-run and to verify the correctness of the base line atom probe and field ion microscopic investigations were performed. According to the received results, the precipitation reactions could be clearly defined and the precipitates were classified. The correctness of the base line construction could also be confirmed by the obtained experimental results.
Translated title of the contributionThermal analysis of precipitation hardening steels
Original languageGerman
  • Leitner, Harald, Co-Supervisor (internal)
  • Clemens, Helmut, Supervisor (internal)
Award date30 Jun 2006
Publication statusPublished - 2006

Bibliographical note

embargoed until null


  • DTA Differential Thermo Analyse Base line Heat capacity Reaction enthalpy Secondary hardening steels Precipitation reaction Atom probe Field ion microscope

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