Lederer, M., Betzwar Kotas, A. M., & Khatibi, G. (2023). Lifetime modeling of solder joints based on accelerated mechanical testing and Finite Element Analysis. Power Electronic Devices and Components, 4, 100034. https://doi.org/10.1016/j.pedc.2023.100034 ( reposiTUm)
Walter, T., Khatibi, G., Betzwar Kotas, A., & Kretschy, N. (2023). In-situ delamination detection in multi-layered semiconductor packages. Microelectronics Reliability, 150, Article 115098. https://doi.org/10.1016/j.microrel.2023.115098 ( reposiTUm)
Betzwar Kotas, A. M., Khatibi, G., Khodabakhshi, F., & Steiger-Thirsfeld, A. (2021). High Cycle Fatigue Behaviour of Cu/Sn Intermetallic Compounds Prepared by Transient Liquid Phase Bonding Process. Materials Science Forum, 1016, 268–273. https://doi.org/10.4028/www.scientific.net/MSF.1016.268 ( reposiTUm)
Lederer, M., Kotas, A. B., & Khatibi, G. (2020). A lifetime assessment and prediction method for large area solder joints. Microelectronics Reliability, 114(113888), 113888. https://doi.org/10.1016/j.microrel.2020.113888 ( reposiTUm)
Lederer, M., Betzwar Kotas, A. M., & Khatibi Damavandi, G. (2020). A lifetime assessment and prediction method for large area solder joints. Microelectronics Reliability, 114, 1–7. https://doi.org/10.1016/j.microrel.2020.113888 ( reposiTUm)
Lederer, M., Betzwar Kotas, A., Khatibi, G., & Danninger, H. (2018). Characterization of adhesion properties by delamination of ceramic-metal interfaces in four point bending. Key Engineering Materials, 774, 66–71. https://doi.org/10.4028/www.scientific.net/kem.774.66 ( reposiTUm)
Khatibi, G., Betzwar Kotas, A., & Lederer, M. (2018). Effect of aging on mechanical properties of high temperature Pb-rich solder joints. Microelectronics Reliability, 85, 1–11. https://doi.org/10.1016/j.microrel.2018.03.009 ( reposiTUm)
Kotas, A. B., Danninger, H., Weiss, B., Mingard, K., Sanchez, J., & Llanes, L. (2017). Fatigue testing and properties of hardmetals in the gigacycle range. International Journal of Refractory Metals and Hard Materials, 62, 183–191. https://doi.org/10.1016/j.ijrmhm.2016.07.004 ( reposiTUm)
Betzwar Kotas, A., & Khatibi, G. (2017). Isothermal bending fatigue response of solder joints in high power semiconductor test structures. Microelectronics Reliability, 76–77, 357–361. https://doi.org/10.1016/j.microrel.2017.06.095 ( reposiTUm)
Danninger, H., Kotas, A. B., & Weiss, B. (2016). Ermüdung von Hartmetallen im Gigacycle-Bereich - Prüftechnik und Werkstoffverhalten. Keramische Zeitschrift, 68(2), 99–109. https://doi.org/10.1007/bf03400246 ( reposiTUm)
Khatibi, G., Lederer, M., Betzwar Kotas, A., Frotscher, M., Krause, A., & Poehlmann, S. (2015). High-cycle fatigue behavior of thin-walled CoCr tubes. International Journal of Fatigue, 80, 103–112. https://doi.org/10.1016/j.ijfatigue.2015.05.013 ( reposiTUm)
Danninger, H., Weiss, B., Betzwar Kotas, A., Khatibi, G., Sohar, C., Dlapka, M., & Gierl-Mayer, C. (2015). Fatigue response and fractography of sintered materials. Powder Metallurgy Progress, 15(2), 218–233. http://hdl.handle.net/20.500.12708/151375 ( reposiTUm)
Dlapka, M., Danninger, H., Gierl, C., Klammer, E., Weiss, B., Khatibi, G., & Betzwar-Kotas, A. (2012). Fatigue behavior and wear resistance of sinter-hardening steels. International Journal of Powder Metallurgy, 48(5), 49–60. http://hdl.handle.net/20.500.12708/163970 ( reposiTUm)
Danninger, H., Sohar, C., Gierl Mayer, C., Betzwar-Kotas, A., & Weiss, B. (2011). Gigacycle fatigue response of PM versus ingot metallurgy tool steels. Materials Science Forum, 672, 23–30. https://doi.org/10.4028/www.scientific.net/msf.672.23 ( reposiTUm)
Dlapka, M., Danninger, H., Gierl, C., Weiss, B., Khatibi, G., & Betzwar-Kotas, A. (2011). Critical defects in different sinter hardening grade steels tested under gigacycle fatigue loading. Powder Metall. Progress, 11(1–2), 69–77. http://hdl.handle.net/20.500.12708/162438 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Danninger, H., & Weiss, B. (2010). Gigacycle fatigue response of tool steels produced by powder metallurgy compared to ingot metallurgy tool steels. International Journal of Materials Research, 101(9), 1140–1150. https://doi.org/10.3139/146.110395 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2009). Fatigue behaviour of M2 and M42 high speed steel up to the gigacycle regime. Kovove Materialy - Metallic Materials, 47(3), 147–158. http://hdl.handle.net/20.500.12708/165700 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2009). PM tool steels push the edge in fatigue tests. Metal Powder Report, 64(2), 12–17. http://hdl.handle.net/20.500.12708/165277 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Gigacycle fatigue behaviour of a high chromium alloyed cold work tool steel. International Journal of Fatigue, 30(7), 1137–1149. https://doi.org/10.1016/j.ijfatigue.2007.09.012 ( reposiTUm)
Sohar, C. R., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Influence of surface residual stresses on gigacycle fatigue response of high chromium cold work tool steel. Materials Science & Engineering Technology, 39(3), 248–257. https://doi.org/10.1002/mawe.200700216 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Anisotropy effects on gigagcycle fatigue behaviour of high Cr alloyed cold work tool steel. Kovove Materialy - Metallic Materials, 46, 197–207. http://hdl.handle.net/20.500.12708/170326 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Gigacycle fatigue fractography of cold work tool steels produced by PM compared to ingot metallurgy. Powder Metall. Progress, 8(3), 190–195. http://hdl.handle.net/20.500.12708/171236 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Fractographic evaluation of gigacycle fatigue crack nucleation and propagation of a high Cr alloyed cold work tool steel. International Journal of Fatigue, 30(12), 2191–2199. https://doi.org/10.1016/j.ijfatigue.2008.05.013 ( reposiTUm)
Beiträge in Tagungsbänden
Lederer, M., Kotas, A. B., Khatibi, G., & Danninger, H. (2020). On crack propagation in homogeneous and composite materials under mixed mode loading conditions. In Procedia Structural Integrity (pp. 203–208). Procedia Structural Integrity. https://doi.org/10.1016/j.prostr.2020.01.087 ( reposiTUm)
Danninger, H., Betzwar Kotas, A., & Weiss, B. (2015). Ermüdung von Hartmetallen im Gigacycle-Bereich - Prüftechnik und Werkstoffverhalten. In H. Kolaska, H. Danninger, & T. Gestrich (Eds.), Pulvermetallurgie in Wissenschaft und Praxis Band 31: Pulvermetallurgie: Effiziente Prozesse - besondere Eigenschaften (pp. 123–145). Fachverband Pulvermetallurgie. http://hdl.handle.net/20.500.12708/49076 ( reposiTUm)
Danninger, H., Sohar, C., Xu, C., Weiss, B., Betzwar-Kotas, A., & Khatibi, G. (2014). Fatigue behaviour of different types of PM steels in the gigacycle range. In R. A. Chernenkoff & W. B. James (Eds.), Manuscript Preprints PM2014 (p. 17). Metal Powder Industries Federation. http://hdl.handle.net/20.500.12708/48546 ( reposiTUm)
Khatibi, G., Lederer, M., Czerny, B., Betzwar Kotas, A., & Weiss, B. (2014). A New Approach for Evaluation of Fatigue Life of Al Wire Bonds in Power Electronics. In Light Metals 2014 (pp. 273–278). John Wiley & Sons. http://hdl.handle.net/20.500.12708/48703 ( reposiTUm)
Betzwar-Kotas, A., Weiss, B., Danninger, H., Sanchez Moreno, J. M., & Mingard, K. (2013). Fatigue testing of hardmetals in the gigacycle range. In H. Kestler & L. Sigl (Eds.), Proceedings 18. Plansee Seminar 2013 (p. 11). Plansee SE. http://hdl.handle.net/20.500.12708/48172 ( reposiTUm)
Dlapka, M., Danninger, H., Gierl, C., Weiss, B., Khatibi, G., & Betzwar-Kotas, A. (2011). Gigacycle fatigue of different low alloyed PM steels for sinter hardening. In Proceedings EuroPM2011 Volume 1 (pp. 3–8). European Powder Metallurgy Association. http://hdl.handle.net/20.500.12708/47434 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Fatigue behaviour of high-chromium alloyed cold work tool steel in the gigacycle fatigue regime. In J. Pokluda, P. Lukas, P. Sandera, & I. Dlouhy (Eds.), ECF17 - 17th European Conference on Fracture - Book of Abstracts & Proceedings on CD-ROM (p. 8). VUTIUM. http://hdl.handle.net/20.500.12708/46289 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Fatigue behaviour of PM tool steels in the gigacycle regime. In Proceedings EuroPM2008, Vol.1 (pp. 219–224). European Powder Metallurgy Association. http://hdl.handle.net/20.500.12708/46156 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Fractographic evaluation of gigacycle fatigue failure of a high Cr alloyed cold work tool steel. In V. Leskovsek, B. Smoljan, H. Jäger, & M. Jenko (Eds.), Materials and Technology - Special Isseu (pp. 104–105). http://hdl.handle.net/20.500.12708/46047 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Anisotropy effects on gigacycle fatigue behavior of 12% chromium alloyed cold work tool steel. In V. Leskovsek, B. Smoljan, H. Jäger, & M. Jenko (Eds.), Materials and Technology - Special Issue (pp. 106–107). http://hdl.handle.net/20.500.12708/46046 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2007). Location of crack initiation in the gigacycle fatigue regime for high chromium alloyed cold work tool steel. In Proceedings (p. 227). Ruhr-Universität. http://hdl.handle.net/20.500.12708/45857 ( reposiTUm)
Betzwar-Kotas, A., Sohar, C., Gierl, C., Weiss, B., & Danninger, H. (2006). Gigacycle fatigue fractography of high Cr alloyed cold work tool steel. In L. Parilak (Ed.), Proceedings Fraktografia / Fractography 2006 (pp. 181–188). Slovak Academy of Sciences. http://hdl.handle.net/20.500.12708/45514 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2006). Gigacycle fatigue fractography of high Cr alloyed cold work tool steel. In A. Kneissl (Ed.), Fortschritte in der Metallographie (pp. 339–346). Werkstoff-Informationsgesellschaft. http://hdl.handle.net/20.500.12708/45491 ( reposiTUm)
Beiträge in Büchern
Khatibi, G., Lederer, M., Czerny, B., Betzwar Kotas, A., & Weiss, B. (2014). A novel experimental and numerical approach for lifetime assessment of microelectronic devices. In Smart Systems Integration for Micro- and Nanotechnologies (pp. 445–451). goldbogen verlag. http://hdl.handle.net/20.500.12708/176257 ( reposiTUm)
Präsentationen
Betzwar Kotas, A. M., Lederer, M., Khatibi Damavandi, G., Boczkal, G., & Perek-Nowak M. (2022). Mechanical Reliability of Lead-Free Solder Joints: Comparative Study of Sn3.5Ag versus SnSbAg Solder Alloy [Poster Presentation]. ISSE 2022, Austria. ( reposiTUm)
Lederer, M., Betzwar Kotas, A. M., & Khatibi Damavandi, G. (2022). Accelerated Fatigue Testing and Lifetime Modelling of Solder Interconnects in Power Electronics [Conference Presentation]. 2022 45th International Spring Seminar on Electronics Technology, Austria. ( reposiTUm)
Khatibi Damavandi, G., Czerny, B., Walter, T., Lederer, M., Betzwar Kotas, A. M., & Zareghomsheh, M. (2022, June). PoF Based Accelerated Testing [Presentation]. CAM-Workshop 2022, Germany. ( reposiTUm)
Betzwar Kotas, A., & Khatibi, G. (2019). Mechanical properties of CuSn intermetallics under static and cyclic loading. 29th Colloquium on Fatigue Mechanisms, Brno, Czechia. http://hdl.handle.net/20.500.12708/101266 ( reposiTUm)
Khatibi, G., Betzwar Kotas, A., & Czerny, B. (2017). Degradation and mechanical fatigue in electronic components. 28th Colloquium on Fatigue Mechanisms, Erlangen-Nürnberg, Germany. http://hdl.handle.net/20.500.12708/100601 ( reposiTUm)
Danninger, H., Weiss, B., Betzwar Kotas, A., Khatibi, G., Sohar, C., & Dlapka, M. (2015). Fractography of Cyclically Loaded Sintered Materials. Workshop “Fractography of Sintered Materials - Principles and Application,” Kosice, Slovakia, EU. http://hdl.handle.net/20.500.12708/99605 ( reposiTUm)
Danninger, H., Betzwar Kotas, A., & Weiss, B. (2015). Gigacycle fatigue behaviour of sintered WC-Co hardmetals investigated by ultrasonic resonance testing. 20. Symposium Verbundwerkstoffe und Werkstoffverbunde, Wien, Austria. http://hdl.handle.net/20.500.12708/99658 ( reposiTUm)
Danninger, H., Xu, C., Sohar, C., Weiss, B., Betzwar-Kotas, A., & Khatibi, G. (2013). Fatigue properties of ferrous PM materials in the gigacycle range. APMA 2013 - 2nd International Conference on Powder Metallurgy in Asia, Xiamen / China, Non-EU. http://hdl.handle.net/20.500.12708/99132 ( reposiTUm)
Danninger, H., Sohar, C., Gierl, C., Betzwar-Kotas, A., & Weiss, B. (2009). Gigacycle fatigue response of PM versus ingot metallurgy tool steels. RoPM 2009 - 4th International Conference on Powder Metallurgy, Craiova, Romania, EU. http://hdl.handle.net/20.500.12708/98031 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Fractographic evaluation and fracture mechanical considerations for a cold-work tool steel. 19th Colloquium on Fatigue Mechanisms, Dresden, EU. http://hdl.handle.net/20.500.12708/97744 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Einsatz physikalischer Analysemethoden bei der Untersuchung des Ermüdungsverhaltens von Werkzeugstählen. 4. ASAC JunganalytikerInnen Forum, Wien, Austria. http://hdl.handle.net/20.500.12708/97786 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Schwingfestigkeit von erschmolzenen und pulvermetallurgischen Werkzeugstählen im Gigacycle-Bereich. Sitzung ASMET-Fachausschuss Pulvermetallurgie, Wien, Austria. http://hdl.handle.net/20.500.12708/97788 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2008). Gigacycle fatigue fractography of cold work tool steel produced by PM compared to ingot metallurgy. “DF PM 2008” Int. Conf. Deformation and Fracture in Structural PM Materials, Stara Lesna, Slovakia, EU. http://hdl.handle.net/20.500.12708/97840 ( reposiTUm)
Sohar, C., Betzwar-Kotas, A., Gierl, C., Weiss, B., & Danninger, H. (2007). Influence of surface residual stresses on gigacycle failure response of cold work tool steel. 18th Colloquium on Fatigue Mechanisms, Poitiers, France, EU. http://hdl.handle.net/20.500.12708/97555 ( reposiTUm)
