Dr. Adeola Olaoluwa Borode is Research Fellow at the Centre for Nanoengineering and Advanced Materials, University of Johannesburg, South Africa, coordinating research on sustainable high-entropy alloys from scrap metals and electronic wastes for the master's program in sustainable advanced materials, with a Ph.D. in mechanical engineering from the University of Johannesburg (2022), an M.Eng. (2017), and a B.Eng. (2011) from Federal University of Technology, Akure, Nigeria. His research spans nanofluids, heat transfer, and machine learning or artificial intelligence-based modeling, with postdoctoral work focusing on sustainable HEAs, titanium alloy/composite design using spark plasma sintering and 3D printing, characterized by SEM/EDS and nanoindentation. As Lecturer in Engineering Metallurgy, he taught advanced engineering materials, welding technology, and material testing. His work on nanofluids and modeling with neural networks enhances material performance. Supervising students in corrosion and wear studies, he contributes to this book, marking his first authored work on sustainable HEAs.Dr. Thato Sharon Tshephe-Borode is Senior Lecturer and Deputy Director of the Centre for Nanoengineering and Advanced Materials at the University of Johannesburg, South Africa. She earned her Ph.D. in engineering metallurgy from the University of Johannesburg (2024), M.Tech. (cum laude, 2013), B.Tech. (2012), and National Diploma (2011) in metallurgical engineering from Tshwane University of Technology. Her expertise encompasses microscopy, additive manufacturing, spark plasma sintering, nanomechanical properties, titanium alloys and composites, biomaterials, and electrochemical techniques. Awarded the Colour Award for B.Tech. (2012), Best Poster Presenter at the International Society of Electrochemistry (2013), TUT-CSIR scholarship (2012–2013), and multiple NRF grants, she has supervised master’s students on high-entropy alloys from e-waste and related topics. With over 20 peer-reviewed publications, including her Ph.D. thesis on 3D-printed zirconia-reinforced alloys, she co-authors this book, advancing sustainable materials research.Prof. Peter Apata Olubambi is Professor in the Department of Engineering Metallurgy at the University of Johannesburg, South Africa, where he is also Head of the Centre for Nanoengineering and Advanced Materials (CeNAM). With a Ph.D. in metallurgical engineering from the University of the Witwatersrand (2008), and M.Eng. and B.Eng. degrees from Federal University of Technology, Akure, Nigeria, he specializes in alloy design, nanomaterials, and advanced material processing. He currently leads and coordinates the Master's of Sustainable Advanced Materials (research and coursework) within the Faculty of Engineering and the Built Environment. His research, with over 300 peer-reviewed publications, 9,000+ citations, and an h-index of 48, focuses on lightweight alloys for aerospace and biomedical applications. He is recognized among the world’s top 2% scientists (2022–2025) by Stanford University and Elsevier for his cutting-edge advancements in Material Science.

• Introduction to High-Entropy Alloys (HEAs).- Materials Sustainability: Concepts and Frameworks.- Alloy Design Strategies for High-Entropy Alloys (HEAs).- Processing and Manufacturing of HEAs.- Waste-Derived Feedstocks for Sustainable HEA Development.- Nanomaterials and Surface Engineering for Sustainable HEAs.- Microstructural Engineering and Property Optimization.- Advanced Characterization of Sustainable HEAs.- Applications of Sustainable HEAs.- Future Directions and Roadmap for Sustainable HEA Development.

Dr. Adeola Olaoluwa Borode is Research Fellow at the Centre for Nanoengineering and Advanced Materials, University of Johannesburg, South Africa, coordinating research on sustainable high-entropy alloys from scrap metals and electronic wastes for the master's program in sustainable advanced materials, with a Ph.D. in mechanical engineering from the University of Johannesburg (2022), an M.Eng. (2017), and a B.Eng. (2011) from Federal University of Technology, Akure, Nigeria. His research spans nanofluids, heat transfer, and machine learning or artificial intelligence-based modeling, with postdoctoral work focusing on sustainable HEAs, titanium alloy/composite design using spark plasma sintering and 3D printing, characterized by SEM/EDS and nanoindentation. As Lecturer in Engineering Metallurgy, he taught advanced engineering materials, welding technology, and material testing. His work on nanofluids and modeling with neural networks enhances material performance. Supervising students in corrosion and wear studies, he contributes to this book, marking his first authored work on sustainable HEAs.Dr. Thato Sharon Tshephe-Borode is Senior Lecturer and Deputy Director of the Centre for Nanoengineering and Advanced Materials at the University of Johannesburg, South Africa. She earned her Ph.D. in engineering metallurgy from the University of Johannesburg (2024), M.Tech. (cum laude, 2013), B.Tech. (2012), and National Diploma (2011) in metallurgical engineering from Tshwane University of Technology. Her expertise encompasses microscopy, additive manufacturing, spark plasma sintering, nanomechanical properties, titanium alloys and composites, biomaterials, and electrochemical techniques. Awarded the Colour Award for B.Tech. (2012), Best Poster Presenter at the International Society of Electrochemistry (2013), TUT-CSIR scholarship (2012–2013), and multiple NRF grants, she has supervised master’s students on high-entropy alloys from e-waste and related topics. With over 20 peer-reviewed publications, including her Ph.D. thesis on 3D-printed zirconia-reinforced alloys, she co-authors this book, advancing sustainable materials research.Prof. Peter Apata Olubambi is Professor in the Department of Engineering Metallurgy at the University of Johannesburg, South Africa, where he is also Head of the Centre for Nanoengineering and Advanced Materials (CeNAM). With a Ph.D. in metallurgical engineering from the University of the Witwatersrand (2008), and M.Eng. and B.Eng. degrees from Federal University of Technology, Akure, Nigeria, he specializes in alloy design, nanomaterials, and advanced material processing. He currently leads and coordinates the Master's of Sustainable Advanced Materials (research and coursework) within the Faculty of Engineering and the Built Environment. His research, with over 300 peer-reviewed publications, 9,000+ citations, and an h-index of 48, focuses on lightweight alloys for aerospace and biomedical applications. He is recognized among the world’s top 2% scientists (2022–2025) by Stanford University and Elsevier for his cutting-edge advancements in Material Science.

• Introduction to High-Entropy Alloys (HEAs).- Materials Sustainability: Concepts and Frameworks.- Alloy Design Strategies for High-Entropy Alloys (HEAs).- Processing and Manufacturing of HEAs.- Waste-Derived Feedstocks for Sustainable HEA Development.- Nanomaterials and Surface Engineering for Sustainable HEAs.- Microstructural Engineering and Property Optimization.- Advanced Characterization of Sustainable HEAs.- Applications of Sustainable HEAs.- Future Directions and Roadmap for Sustainable HEA Development.

Dr. Adeola Olaoluwa Borode is Research Fellow at the Centre for Nanoengineering and Advanced Materials, University of Johannesburg, South Africa, coordinating research on sustainable high-entropy alloys from scrap metals and electronic wastes for the master's program in sustainable advanced materials, with a Ph.D. in mechanical engineering from the University of Johannesburg (2022), an M.Eng. (2017), and a B.Eng. (2011) from Federal University of Technology, Akure, Nigeria. His research spans nanofluids, heat transfer, and machine learning or artificial intelligence-based modeling, with postdoctoral work focusing on sustainable HEAs, titanium alloy/composite design using spark plasma sintering and 3D printing, characterized by SEM/EDS and nanoindentation. As Lecturer in Engineering Metallurgy, he taught advanced engineering materials, welding technology, and material testing. His work on nanofluids and modeling with neural networks enhances material performance. Supervising students in corrosion and wear studies, he contributes to this book, marking his first authored work on sustainable HEAs.Dr. Thato Sharon Tshephe-Borode is Senior Lecturer and Deputy Director of the Centre for Nanoengineering and Advanced Materials at the University of Johannesburg, South Africa. She earned her Ph.D. in engineering metallurgy from the University of Johannesburg (2024), M.Tech. (cum laude, 2013), B.Tech. (2012), and National Diploma (2011) in metallurgical engineering from Tshwane University of Technology. Her expertise encompasses microscopy, additive manufacturing, spark plasma sintering, nanomechanical properties, titanium alloys and composites, biomaterials, and electrochemical techniques. Awarded the Colour Award for B.Tech. (2012), Best Poster Presenter at the International Society of Electrochemistry (2013), TUT-CSIR scholarship (2012–2013), and multiple NRF grants, she has supervised master’s students on high-entropy alloys from e-waste and related topics. With over 20 peer-reviewed publications, including her Ph.D. thesis on 3D-printed zirconia-reinforced alloys, she co-authors this book, advancing sustainable materials research.Prof. Peter Apata Olubambi is Professor in the Department of Engineering Metallurgy at the University of Johannesburg, South Africa, where he is also Head of the Centre for Nanoengineering and Advanced Materials (CeNAM). With a Ph.D. in metallurgical engineering from the University of the Witwatersrand (2008), and M.Eng. and B.Eng. degrees from Federal University of Technology, Akure, Nigeria, he specializes in alloy design, nanomaterials, and advanced material processing. He currently leads and coordinates the Master's of Sustainable Advanced Materials (research and coursework) within the Faculty of Engineering and the Built Environment. His research, with over 300 peer-reviewed publications, 9,000+ citations, and an h-index of 48, focuses on lightweight alloys for aerospace and biomedical applications. He is recognized among the world’s top 2% scientists (2022–2025) by Stanford University and Elsevier for his cutting-edge advancements in Material Science.

• Introduction to High-Entropy Alloys (HEAs).- Materials Sustainability: Concepts and Frameworks.- Alloy Design Strategies for High-Entropy Alloys (HEAs).- Processing and Manufacturing of HEAs.- Waste-Derived Feedstocks for Sustainable HEA Development.- Nanomaterials and Surface Engineering for Sustainable HEAs.- Microstructural Engineering and Property Optimization.- Advanced Characterization of Sustainable HEAs.- Applications of Sustainable HEAs.- Future Directions and Roadmap for Sustainable HEA Development.