Big Picture 4

introduction.tex

@@ -17,14 +17,9 @@ \section{Big Picture} \label{intro:sec:bigpicture}
     \label{intro:fig:bigpicture}
 \end{figure}
 
-Motivation 1:
-Per DOE ARPA-E estimates, developing a standalone alloy which could continuously operate at $1300^oC$ has the potential to increase gas turbine efficiency up to $7\%$, which will significantly reduce wasted energy and carbon emissions by saving up to 20 quads of energy in electricity generation and civilian aviation between now and 2050 \cite{ULTIMATEArpa-e.energy.gov}. Such efficiency increase could prevent release of approximately 1,000,000,000,000 kg of \ch{CO_2} from burning natural gas, or double that from coal.
-
-Motivation 2:
-Another extreme environment application is the class of hypersonic vehicles which travel faster than 5 times the speed of sound \emph{through Earth's atmosphere for extended periods of time}, thus, generating extreme sustained temperatures within structural components. This prompts the need for novel materials and engineering techniques, as evidenced by massive funding assigned to this research areas by United States military which increased its yearly budgets for hypersonic \emph{research} from \$3.8 billion in FY2022, to \$4.7 billion in FY2023, and to an undisclosed amount this year (FY2024) \cite{Sayler2024HypersonicCongress}.
-
-\todo
+The motivation for this specific choice of application - \emph{metallic alloys targeting extreme environments}, has been twofold. First, several intrinsic challenges, including competing property trends, scarce experimental data (relative to room temprature), and compositional complexity of currently studied alloy families, make this problem very difficult. Thus, it is also a great target for design of advanced methdods that can mitigate them, while encountering and addressing otherwise hidden problems.
 
+Secondly, such alloys are of great interest to the society. For instance, per Department of Energy's ARPA-E estimates, developing a standalone alloy which could continuously operate at $1300^oC$ has the potential to increase gas turbine efficiency up to $7\%$, which will significantly reduce wasted energy and carbon emissions by saving up to 20 quads of energy in electricity generation and civilian aviation between now and 2050 \cite{ULTIMATEArpa-e.energy.gov}. Such efficiency increase could prevent release of approximately 1,000,000,000,000 kg of \ch{CO_2} from burning natural gas, or double that from coal; thus, becoming a critical effort in fighting global warming in applications, like airplanes, where green technologies cannot be directly adapted. Another extreme environment application, quite far from the first one, is the class of hypersonic vehicles which travel faster than 5 times the speed of sound \emph{through Earth's atmosphere for extended periods of time}, thus, generating extreme sustained temperatures within structural components. This prompts the need for novel materials and engineering techniques, as evidenced by massive funding assigned to this research areas by United States military which increased its yearly budgets for hypersonic \emph{research} from \$3.8 billion in FY2022, to \$4.7 billion in FY2023, and to an undisclosed amount this year (FY2024) \cite{Sayler2024HypersonicCongress}, further demonstrating the criticality of such materials.
 
 
 \section{Flow of Material Discovery and This Work} \label{intro:sec:flow}