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Senior Engineer

Dr.-Ing. Marina Macias Barrientos (born Knyazeva)

Main activities

  • Senior Engineer
  • Financial planning
  • Head of laboratory metallography and microscopy
  • Lecture Microscopy and Microanalysis
  • Focused ion beam scanning electron microscopy (FIB-SEM)
  • International cooperation
  • Coordination competence field Structural Analysis

Overview of research projects in group steels

Curriculum Vitae

Research

  • Multiscale structure characterization

  • Electron microscopy and microanalysis

  • Advanced high resolution techniques (EBSD, FIB-SEM, AFM / MFM)

  • Development of in-situ methods

  • Failure analysis

Publications and presentations

25) Moritz, J.; Teschke, M.; Marquardt, A.; Stepien, L.; López, E.; Brückner, F.; Macias Barrientos, M.; Walther, F.; Leyens, C. :
Electron beam powder bed fusion of γ-titanium aluminide: Effect of processing parameters on part density, surface characteristics, and aluminum content.
Metals 11 (7), 1093 (2021) 1-19. https://doi.org/10.3390/met11071093 - Download

24) Ungermann, D.; Hatke, P.; Knyazeva, M.; Walther, F.; Lebelt, P.; Gehrke, J.:
Innovationen zum optimalen Einsatz des wetterfesten Baustahls im Stahl- und Verbundbrückenbau.
Stahlbau 90 (2), (2021) 106-115. https://doi.org/10.1002/stab.202000090

23) Wegner, N.; Knyazeva, M.; Walther, F.:
Elektrochemisch-basierte Kurzzeitprüfmethode zur Bewertung des Korrosionsverhaltens der biomedizinischen Magnesium-Legierung WE43MEO.
Skriptsammlung des DVM-AK „Zuverlässigkeit von Implantaten und Biostrukturen“, (2020) 13-25.

22) Choudhary, R.; Venkatraman, S. K.; Bulygina, I.; Chatterjee, A.; Abraham, J.; Fedor, S.; Kaloshkin, S.; Ilyasov, A.; Abakumov, M.; Knyazeva, M.; Kukui, D.; Walther, F.; Swamiappan, S.:
Impact of forsterite addition on mechanical and biological properties of composites.
Journal of Asian Ceramic Societies 8, 3 (2020) 1-15. https://doi.org/10.1080/21870764.2020.1807695 - Download

21) Otto, J. L.; Penyaz, M.; Schmiedt-Kalenborn, A.; Knyazeva, M.; Ivannikov, A.; Kalin, B.; Walther, F.:
Effect of phase formation due to holding time of vacuum brazed AISI 304L/NiCrSiB joints on corrosion fatigue properties.
Journal of Materials Research and Technology 9, 5 (2020) 10550-10558. https://doi.org/10.1016/j.jmrt.2020.07.047 - Download

20) Senatov, F., Amanbek, G., Orlova, P., Bartov, M., Grunina, T., Kolesnikov, E., Maksimkin, A., Kaloshkin, S.D., Poponova, M., Nikitin, K., Krivozubov, M., Strukova, N., Manskikh, V., Anisimova, N., Kiselevskiy, M., Scholz, R., Knyazeva, M., Walther, F., Lunin, V., Gromov, A., Karyagina, A.:
Biomimetic UHMWPE/HA scaffolds with rhBMP-2 and erythropoietin for reconstructive surgery.
Materials Science & Engineering C, (2020) 110750 1-14. https://doi.org/10.1016/j.msec.2020.110750

19) Bulygina, I.; Senatov, F.; Choudhary, R.; Kolesnikov, E.; Kaloshkin, S.; Scholz, R.; Knyazeva, M.; Walther, F.; Anisimova, N.; Kiselevskiy, M.:
Biomimetic scaffold fabricated with a mammalian trabecular bone template.
Polymer Degradation and Stability, 172 (2020) 109076 1-9. https://doi.org/10.1016/j.polymdegradstab.2020.109076

18) Wegner, N.; Scholz, R.; Knyazeva, M.; Walther, F.:
Service life characterization of orthopedic implant material made of ultra-high molecular weight polyethylene under physiological conditions.
Journal of the Mechanical Behavior of Biomedical Materials 104, 103617 (2020) 1-8. https://doi.org/10.1016/j.jmbbm.2020.103617

17) Acosta, R.; Boller, C.; Starke, P.; Jamrozy, M.; Knyazeva, M.; Walther, F.; Heckmann, K.; Sievers, J.; Schopf, T.; Weihe, S.:
Non-destructive testing derived parameters for microstructure-based residual service life assessment of aging metallic materials in nuclear engineering.
Materials Testing 61/11 (2019) 1029-1038. https://doi.org/10.3139/120.111417 - Download

16) Barbeck, M.; Jung, O.; Xiong, X.; Krastev, R.; Korzinskas, T.; Najman, S.; Radenkovic, M.; Wegner, N.; Knyazeva, M.; Walther, F.:
Balancing purification and ultrastructure of naturally derived bone blocks for bone regeneration: Report of the purification effort of two bone blocks.
Materials 12 (19), 3234 (2019) 1-13. https://doi.org/10.3390/ma12193234 - Download

15) Salmen, B.T.; Knyazeva, M.; Walther, F.:
Development of a structural integrity non-destructive inspection system for bridges made of weathering steel.
ICBMM 2018, Matec Web of Conferences 278, 03006 (2019) 1-5. https://doi.org/10.1051/matecconf/201927803006

14) Scholz, R.; Wegner, N.; Porchetta, D.; Knyazeva, M.; Walther, F.:
Novel in vitro test for characterizing the long-term resistance of UHMWPE as implant material.
Skriptsammlung des DVM-AK „Zuverlässigkeit von Implantaten und Biostrukturen“, (2018) 1-17.

13) Tillmann, W.; Walther, F.; Luo, W.; Haack, M.; Nellesen, J.; Knyazeva, M.:
In situ acoustic monitoring of thermal spray process using high-frequency impulse measurements.
Journal of Thermal Spray Technology 27 (2018), 50-58. https://doi.org/10.1007/s11666-017-0673-z

12) Knyazeva, M.; Rozo Vasquez, J., Gondecki, L.; Weibring, M.; Pöhl, F.; Kipp, M.; Tenberge, P.; Theisen, W; Walther, F.; Biermann, D.:
Micro-magnetic and microstructural characterization of wear progress on case-hardened 16MnCr5 gear wheels.
Materials 11(11), 2290 (2018) 1-17. https://doi.org/10.3390/ma11112290 - Download

11) Acosta, R.; Starke, P.; Boller, C.; Jamrozy, M.; Klein, M.; Knyazeva, M.; Walther, F.; Heckmann, K.; Sievers, J.; Schopf, T.; Schuler, X.:
Nutzung zerstörungsfreier Prüfverfahren zur mikrostrukturbasierten Restlebensdauerbewertung alternder metallischer Werkstoffe und Komponenten in der Energietechnik.
DGZfP-Jahrestagung (2018) 1-12.

10) Scholz, R.; Knyazeva, M.; Porchetta, D.; Wegner, N.; Senatov, F.; Salimon, A.; Kaloshkin, S.; Walther, F.:
Development of biomimetic in vitro fatigue assessment for UHMWPE implant materials.
Journal of the Mechanical Behavior of Biomedical Materials 85 (2018) 94-101. https://doi.org/10.1016/j.jmbbm.2018.05.034

9) Hoppius, J. S., Kukreja, L. M., Knyazeva, M., Pöhl, F., Walther, F., Ostendorf, A., Gurevich, E. L.:
On femtosecond laser shock peening of stainless steel AISI 316.
Applied Surface Science 435 (2018) 1120-1124. https://doi.org/10.1016/j.apsusc.2017.11.145

8) Tillmann, W.; Walther, F.; Luo, W.; Haack, M.; Nellesen, J.; Knyazeva, M.:
In situ acoustic monitoring of thermal spray process using high-frequency impulse measurements.
ITSC 2017, Proceedings of the International Thermal Spray Conference 2017 - DVS-Berichte Volume 336, DVS Media GmbH, ISBN 978-3-96144-000-9 (2017) 72-78.

7) Pohl, M.; Knyazeva, M.:
Failure Analysis to Unambiguously Clarify Hydrogen Fracturing in Steels.
International Hydrogen Conference, Moran, Wyoming, USA (2016) 377-381.

6) Knyazeva, M.; Pohl, M.:
Duplex Steels: Part II: Carbides and Nitrides.
Metallography, Microstructure, and Analysis 2 (2013) 343-351.

5) Knyazeva, M.; Pohl, M.:
Duplex Steels: Part I: Genesis, Formation, Structure.
Metallography, Microstructure, and Analysis 2 (2013) 113-121.

4) Bockelmann, M.; Heather, J.; Knyazeva, M.:
Solution annealing of thick walled large-diameter super duplex stainless steel pipes by induction heat treatment.
Stainless Steel World Nov. (2012) 1-7.

3) Knyazeva, M.; Pohl, M.:
Untersuchung der Zähigkeit von Duplex-Stählen mittels Electron Backscattered Diffraction.
Werkstoffprüfung 2010 - Konstruktion, Werkstoffentwicklung und Schadensanalyse, Hrsg.: M. Pohl, Stahleisen, ISBN 978-3-514-00778-9 (2010) 371-376.

2) Knyazeva, M.; Heimann, S.; Pohl, M.:
Gefügeuntersuchungen an Aluminiummatrix-Verbundwerkstoffen mittels EBSD.
Sonderbände der Praktischen Metallographie 42 (2010) 403-408.

1) Heimann, S.; Knyazeva, M.; Pohl, M.:
EBSD-Gefügeuntersuchungen an Aluminiummatrix-Verbundwerkstoffen.
Praktische Metallographie 47 (2010) 640-653.

 

List of all publications

17) Penyaz, M. (V.); Otto, J. L.; Ivannikov, A.; Schmiedt-Kalenborn, A.; Knyazeva, M.; Walther, F.; Kalin, B.:
Influence of the structural-phase state of AISI 304 / NiCrSiB brazed joints on corrosion fatigue.
18th International Conference “New Materials”, Non-equilibrium states: theory, production and application, Web Conference, 14.-17. Dec. (2020)

16) Wegner, N. (V.); Knyazeva, M.; Walther, F.:
Elektrochemisch-basierte Kurzzeitprüfmethode zur Bewertung des Korrosionsverhaltens der biomedizinischen Magnesium-Legierung WE43MEO.
DVM-AK „Zuverlässigkeit von Implantaten und Biostrukturen“, Web-Konferenz, 26. Nov. (2020).

15) Wegner, N. (V.); Klein, M.; Scholz, R.; Knyazeva, M.; Walther, F.:
In vitro short-time method for the determination of long-term stability of implant materials.
5th Euro BioMAT - European Symposium & Exhibition on Biomaterials and Related Areas, Weimar, 08.-09. Mai (2019).

14) Knyazeva, M. (V.); Rozo Vasquez, J., Gondecki, L.; Weibring, M.; Pöhl, F.; Kipp, M.; Tenberge, P.; Theisen, W; Walther, F.; Biermann, D.:
Micro-magnetic and microstructural characterization of wear progress on case-hardened 16MnCr5 gear wheels.
2nd International Conference Materials Chain MCIC2018, Bochum, Germany, 12.-14. Nov. (2018).

13) Wegner, N. (V.); Scholz, R.; Porchetta, D.; Knyazeva, M.; Walther, F.:
In vitro short-time procedure for the determination of long-term stability of UHMWPE implant materials.
Annual Meeting of the German Society for Biomaterials, Braunschweig, 08.-10. Nov. (2018).

12) Wegner, N. (V.); Scholz, R.; Porchetta, D.; Knyazeva, M.; Walther, F.:
In vitro-Kurzzeitmethode zur Bestimmung der Ermüdungseigenschaften von Ultra-High-Molecular-Weight Polyethylene (UHMWPE).
DGM/DVM-AG Materialermüdung, Technische Universität Dortmund, Dortmund, 25.-26. Okt. (2018).

11) Scholz, R. (V.); Wegner, N.; Porchetta, D.; Knyazeva, M.; Walther, F.:
Novel in vitro test for characterizing the long-term resistance of UHMWPE as implant material.
DVM-AK „Zuverlässigkeit von Implantaten und Biostrukturen“, Berlin, 19.-20. Okt. (2018).

10) Knyazeva, M. (V.); Salmen, B.; Walther, F.:
Development of a structural integrity non-destructive inspection system for bridges made of weathering steel.
ICBMM 2018, 2nd International Conference on Building Materials and Materials Engineering, Lisbon, Portugal, 26.-28. Sept. (2018).

9) Knyazeva, M. (V.); Scholz, R.; Wegner, N.; Porchetta, D.; Walther, F.:
Development of novel in vitro fatigue test for biomimetic implants made of UHMWPE.
Innovative Material Science & Nanotechnology Conference, Valencia, Spain, 09.-11. July (2018).

8) Acosta, R.; Starke, P. (V.); Boller, C.; Jamrozy, M.; Klein, M.; Knyazeva, M.; Walther, F.; Heckmann, K.; Sievers, J.; Schopf, T.; Schuler, X.:
Nutzung zerstörungsfreier Prüfverfahren zur mikrostrukturbasierten Restlebensdauerbewertung alternder metallischer Werkstoffe und Komponenten in der Energietechnik.
DGZfP-Jahrestagung 2018, Leipzig, 07.-09. Mai (2018).

7) Knyazeva, M. (V.); Scholz, R.; Porchetta, D.; Walther, F.:
A novel in vitro fatigue test for biomimetic implants made of UHMWPE.
2018 TMS Annual Meeting & Exhibition, Phoenix, AZ, USA, 11.-15. Mar. (2018).

6) Knyazeva, M. (V.); Pohl, M.; Walther, F.:
Characterization of deformation mechanisms of stainless steels assisted by phase transformation by means of EBSD analysis combined with nanoindentation.
2018 TMS Annual Meeting & Exhibition, Phoenix, AZ, USA, 11.-15. Mar. (2018).

5) Knyazeva, M. (V.); Walther, F.; Pohl, M.:
Characterization of deformation and fracture behavior of stainless duplex steels at sub-zero temperatures by means of EBSD-analysis.
EUROMAT 2017, European Congress and Exhibition on Advanced Materials and Processes, Thessaloniki, Greece, 17.-22. Sept. (2017).

4) Knyazeva, M. (V.); Schmiedt, A.; Klein, M; Walther, F.:
Mikrostruktur- und mechanismenbasierte in situ-Charakterisierung der Korrosionsermüdung.
DGM Regionalforum 2017, Essen, 04.-05. Sept. (2017).

3) Tillmann, W.; Walther, F.; Luo, W. (V.); Haack, M.; Nellesen, J.; Knyazeva, M.:
In situ acoustic monitoring of thermal spray process using high-frequency impulse measurements.
International Thermal Spray Conference, Düsseldorf, 07.-09. Juni (2017).

2) Knyazeva, M. (V.); Pohl, M.; Walther, F.:
Root cause of duplex stainless steels embrittlement at sub-zero temperatures.
Duplex World Seminar & Summit, Düsseldorf, 12.-13. Okt. (2016).

1) Knyazeva, M. (V.); Pohl, M.; Walther, F.:
Cathodic and anodic micromechanisms of stress corrosion cracking.
Duplex World Seminar & Summit, Düsseldorf, 12.-13. Okt. (2016).

 

List of all presentations

Location & approach

The campus of TU Dort­mund University is located close to interstate junction Dort­mund West, where the Sauerlandlinie A45 (Frankfurt-Dort­mund) crosses the Ruhrschnellweg B1/A40. The best interstate exit to take from A45 is "Dort­mund-Eichlinghofen (6)" (closer to Campus Süd), and from B1/A40 "Dort­mund-Barop (44)" (closer to Campus Nord). Signs for the uni­ver­si­ty are located at both exits. Follow the signs towards Campus-Süd.

The Department of Materials Test Engineering (WPT) is located in the "Maschinenbau III" building, which can be reached via entrance 41, where parking spaces are available. The secretariat is located on the third floor in E 03 - room 3.027.

For the approach to the TU Dort­mund University you will find the navigation on Google Maps.

Address for navigation devices:

Baroper Straße 303

D-44227 Dortmund

Germany

TU Dort­mund University has its own train station ("Dort­mund Uni­ver­si­tät"). From there, suburban trains (S-Bahn) leave for Dort­mund main station ("Dort­mund Hauptbahnhof") and Düsseldorf main station via the "Düsseldorf Airport Train Station" (take S-Bahn number 1). The uni­ver­si­ty is easily reached from Bochum, Essen, Mülheim an der Ruhr and Duisburg. From there, Campus Süd, where the Department of Materials Test Engineering (WPT) is located, can be reached in five minutes via the H-Bahn in the direction of "Eichlinghofen" or "Campus Süd".

After leaving the H-Bahn station "Campus Süd" cross the small street and go straight forward. Take the stairs (elevator on the left side).
Turn right directly under the canopy, go approximately 200 m, the Building "Maschinenbau III" is at the end of the path.

The office is located on the third floor in E03 - room 3.027.

Dortmund's public transport company DSW21 offers an interactive route network map with timetable information.

The AirportExpress is a fast and convenient means of transport from Dort­mund Airport (DTM) to Dort­mund Central Station, taking you there in little more than 20 minutes. From Dort­mund Central Station, you can continue to the uni­ver­si­ty campus by interurban railway (S-Bahn). A larger range of in­ter­na­tio­nal flight connections is offered at Düsseldorf Airport (DUS), which is about 60 kilometres away and can be directly reached by S-Bahn from the uni­ver­si­ty station.

The H-Bahn is one of the hallmarks of TU Dort­mund University. There are two stations on Campus Nord. One ("Dort­mund Uni­ver­si­tät S") is directly located at the suburban train stop, which connects the uni­ver­si­ty directly with the city of Dort­mund and the rest of the Ruhr Area. Also from this station, there are connections to the "Technologiepark" and (via Campus Süd) Eichlinghofen. The other station is located at the dining hall at Campus Nord and offers a direct connection to Campus Süd every five minutes.

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