Oscar A. Zambrano
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Oscar A. Zambrano has a total of 63 co-authors. Here are the top co-authors by number of shared publications:
- John Jairo Coronado
Research Group of Fatigue and Surfaces, Mechanical Engineering School, Universidad del Valle, Cali, Colombia
11 shared publications S.A. Rodríguez
7 shared publications- Sara Aida Rodriguez Pulecio
Surface Phenomena Laboratory, Department of Mechanical Engineering, University of São Paulo, 05508-900 São Paulo - SP. Brazil
6 shared publications J.J. Coronado
4 shared publicationsJiaren (Jimmy) Jiang
4 shared publicationsS. A. Rodríguez
Research Group of Fatigue and Surfaces, Mechanical Engineering School, Universidad del Valle, Cali, Colombia
4 shared publications
Latest Publications
- 4 August 2026
- Published by Elsevier in Materials Characterization
- Vol. 240
Effect of aluminum content on fatigue crack propagation and crack-tip deformation mechanisms in Fe–Mn–Al–C steels
- 4 August 2026
- Published by Elsevier in Materials Characterization
- Vol. 240
Effect of aluminum content on fatigue crack propagation and crack-tip deformation mechanisms in Fe–Mn–Al–C steels
- Open Access
- 6 July 2026
- Published by Elsevier in International Journal of Greenhouse Gas Control
- Vol. 155
Corrosion in CO2 capture systems. Part I: Initial characterization and the effect of CO2 loading and test temperature
- 6 July 2026
- Published by Elsevier in International Journal of Greenhouse Gas Control
- Vol. 155
Open AccessCorrosion in CO2 capture systems. Part I: Initial characterization and the effect of CO2 loading and test temperature
- 27 June 2026
- Published by Springer Nature in Journal of Materials Engineering and Performance
- Vol. 35 (35) , 36957-36974
The Effect of Ni Additions on the Sliding Wear of Fe-Mn-Al-C Steels
- 27 June 2026
- Published by Springer Nature in Journal of Materials Engineering and Performance
- Vol. 35 (35) , 36957-36974
The Effect of Ni Additions on the Sliding Wear of Fe-Mn-Al-C Steels
- Open Access
- 2 June 2026
- Published by Elsevier in SSRN Electronic Journal
Effect of Aluminum Content on Fatigue Crack Propagation and Crack-Tip Deformation Mechanisms in Fe–Mn–Al–C Steels
Fatigue crack propagation (FCP) behavior of Fe-22Mn-xAl-C alloys with varying aluminum contents (0, 3, and 8 wt.%) was investigated at room temperature. Crack growth was monitored using compliance-based crack closure measurements, while electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were employed to characterize microstructural evolution in the vicinity of the crack tip. Although deformation mechanisms such as transformation-induced plasticity (TRIP), twinning-induced plasticity (TWIP), and microband-induced plasticity (MBIP) are active in these alloys, their contribution to stable crack growth rates was found to be highly localized near the crack tip. A clear transition in the dominant deformation mechanism was observed with increasing aluminum content, from localized TRIP/TWIP activity in low-Al alloys to dislocation cell formation associated with MBIP in the 8Al alloy. This transition was accompanied by a reduction in the Σ3 twin boundary fraction and a pronounced expansion of the plastically deformed zone, indicating enhanced strain delocalization. The results demonstrate that austenite stabilization and strain delocalization significantly increase the fatigue crack growth threshold (\Delta K_{th}), despite a reduction in roughness-induced crack closure, highlighting the critical role of aluminum content in controlling crack-tip deformation mechanisms and intrinsic fatigue resistance in Fe-Mn-Al-C steels. This study provides a systematic microstructure-based assessment of aluminum effects on fatigue crack propagation, addressing a gap in the current literature.
- 2 June 2026
- Published by Elsevier in SSRN Electronic Journal
Open AccessEffect of Aluminum Content on Fatigue Crack Propagation and Crack-Tip Deformation Mechanisms in Fe–Mn–Al–C Steels
Fatigue crack propagation (FCP) behavior of Fe-22Mn-xAl-C alloys with varying aluminum contents (0, 3, and 8 wt.%) was investigated at room temperature. Crack growth was monitored using compliance-based crack closure measurements, while electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were employed to characterize microstructural evolution in the vicinity of the crack tip. Although deformation mechanisms such as transformation-induced plasticity (TRIP), twinning-induced plasticity (TWIP), and microband-induced plasticity (MBIP) are active in these alloys, their contribution to stable crack growth rates was found to be highly localized near the crack tip. A clear transition in the dominant deformation mechanism was observed with increasing aluminum content, from localized TRIP/TWIP activity in low-Al alloys to dislocation cell formation associated with MBIP in the 8Al alloy. This transition was accompanied by a reduction in the Σ3 twin boundary fraction and a pronounced expansion of the plastically deformed zone, indicating enhanced strain delocalization. The results demonstrate that austenite stabilization and strain delocalization significantly increase the fatigue crack growth threshold (\Delta K_{th}), despite a reduction in roughness-induced crack closure, highlighting the critical role of aluminum content in controlling crack-tip deformation mechanisms and intrinsic fatigue resistance in Fe-Mn-Al-C steels. This study provides a systematic microstructure-based assessment of aluminum effects on fatigue crack propagation, addressing a gap in the current literature.
- Open Access
- 5 March 2026
- Published by Elsevier in International Journal of Hydrogen Energy
- Vol. 223
The role of pearlite lamellae spacing on hydrogen permeation
- 5 March 2026
- Published by Elsevier in International Journal of Hydrogen Energy
- Vol. 223
Open AccessThe role of pearlite lamellae spacing on hydrogen permeation
- Open Access
- 5 February 2026
- Published by Elsevier in SSRN Electronic Journal
Effect of Aluminum Content on Fatigue Crack Propagation and Crack-Tip Deformation Mechanisms in Fe–Mn–Al–C Steels
Fatigue crack propagation (FCP) behavior of Fe-22Mn-xAl-C alloys with varying aluminum contents (0, 3, and 8 wt.%) was investigated at room temperature. Crack growth was monitored using compliance-based crack closure measurements, while electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were employed to characterize microstructural evolution in the vicinity of the crack tip. Although deformation mechanisms such as transformation-induced plasticity (TRIP), twinning-induced plasticity (TWIP), and microband-induced plasticity (MBIP) are active in these alloys, their contribution to stable crack growth rates was found to be highly localized near the crack tip. A clear transition in the dominant deformation mechanism was observed with increasing aluminum content, from localized TRIP/TWIP activity in low-Al alloys to dislocation cell formation associated with MBIP in the 8Al alloy. This transition was accompanied by a reduction in the Σ3 twin boundary fraction and a pronounced expansion of the plastically deformed zone, indicating enhanced strain delocalization. The results demonstrate that austenite stabilization and strain delocalization significantly increase the fatigue crack growth threshold (\Delta K_{th}), despite a reduction in roughness-induced crack closure, highlighting the critical role of aluminum content in controlling crack-tip deformation mechanisms and intrinsic fatigue resistance in Fe-Mn-Al-C steels. This study provides a systematic microstructure-based assessment of aluminum effects on fatigue crack propagation, addressing a gap in the current literature.
- 5 February 2026
- Published by Elsevier in SSRN Electronic Journal
Open AccessEffect of Aluminum Content on Fatigue Crack Propagation and Crack-Tip Deformation Mechanisms in Fe–Mn–Al–C Steels
Fatigue crack propagation (FCP) behavior of Fe-22Mn-xAl-C alloys with varying aluminum contents (0, 3, and 8 wt.%) was investigated at room temperature. Crack growth was monitored using compliance-based crack closure measurements, while electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were employed to characterize microstructural evolution in the vicinity of the crack tip. Although deformation mechanisms such as transformation-induced plasticity (TRIP), twinning-induced plasticity (TWIP), and microband-induced plasticity (MBIP) are active in these alloys, their contribution to stable crack growth rates was found to be highly localized near the crack tip. A clear transition in the dominant deformation mechanism was observed with increasing aluminum content, from localized TRIP/TWIP activity in low-Al alloys to dislocation cell formation associated with MBIP in the 8Al alloy. This transition was accompanied by a reduction in the Σ3 twin boundary fraction and a pronounced expansion of the plastically deformed zone, indicating enhanced strain delocalization. The results demonstrate that austenite stabilization and strain delocalization significantly increase the fatigue crack growth threshold (\Delta K_{th}), despite a reduction in roughness-induced crack closure, highlighting the critical role of aluminum content in controlling crack-tip deformation mechanisms and intrinsic fatigue resistance in Fe-Mn-Al-C steels. This study provides a systematic microstructure-based assessment of aluminum effects on fatigue crack propagation, addressing a gap in the current literature.
- 11 September 2025
- Published by Elsevier in International Journal of Hydrogen Energy
- Vol. 174
Towards the understanding of hydrogen embrittlement in pipeline steels using EBSD
- 11 September 2025
- Published by Elsevier in International Journal of Hydrogen Energy
- Vol. 174
Towards the understanding of hydrogen embrittlement in pipeline steels using EBSD
- Open Access
- 27 August 2025
- Published by Springer Nature in Metallurgical and Materials Transactions A
- Vol. 56 (11) , 4913-4929
Unveiling the Mechanism of Cyclic Indentation in a Fe–Mn–Al–C Alloy
This study explores the cyclic elastoplastic deformation behavior of an Fe–Mn–Al–C alloy at room temperature by employing load-controlled nanoindentation with a Berkovich indenter, offering new insights into the competition between plastic and elastic energy. The dynamic nanoindentation tests were conducted with load ratios $$\left(R= {P}_\text{min}/{P}_\text{max}\right)$$ ranging from 0 to 0.5 for 100 and 200 mN, considering 50, 300 and 500 loading cycles. Results revealed that at the maximum depth, the elastic (E e) and plastic (E p) energy remains constant, whereas the ability to absorb E p decreases by approximately 1.4 and the E e decreases by approximately 1.5 when R varies from 0 to 0.5. Additionally, the relationship between E e and E p is ~ 2 times regardless of the load or number of load cycles. The occurrence of pop-ins at low loads suggests potential interactions between dislocations and twins, given the austenitic nature of the alloy with a low stacking fault energy (SFE). Creep behavior was analyzed at loads ranging from 1 to 10 mN with a holding time of 30 seconds. The creep rate increases with increasing load and holding time, suggesting that at the macroscopic scale, the strain rate affects the strain hardening rate.- 27 August 2025
- Published by Springer Nature in Metallurgical and Materials Transactions A
- Vol. 56 (11) , 4913-4929
Open AccessUnveiling the Mechanism of Cyclic Indentation in a Fe–Mn–Al–C Alloy
This study explores the cyclic elastoplastic deformation behavior of an Fe–Mn–Al–C alloy at room temperature by employing load-controlled nanoindentation with a Berkovich indenter, offering new insights into the competition between plastic and elastic energy. The dynamic nanoindentation tests were conducted with load ratios $$\left(R= {P}_\text{min}/{P}_\text{max}\right)$$ ranging from 0 to 0.5 for 100 and 200 mN, considering 50, 300 and 500 loading cycles. Results revealed that at the maximum depth, the elastic (E e) and plastic (E p) energy remains constant, whereas the ability to absorb E p decreases by approximately 1.4 and the E e decreases by approximately 1.5 when R varies from 0 to 0.5. Additionally, the relationship between E e and E p is ~ 2 times regardless of the load or number of load cycles. The occurrence of pop-ins at low loads suggests potential interactions between dislocations and twins, given the austenitic nature of the alloy with a low stacking fault energy (SFE). Creep behavior was analyzed at loads ranging from 1 to 10 mN with a holding time of 30 seconds. The creep rate increases with increasing load and holding time, suggesting that at the macroscopic scale, the strain rate affects the strain hardening rate.