Academic Journal

High-throughput quantification of quasistatic, dynamic and spall strength of materials across 10 orders of strain rates

التفاصيل البيبلوغرافية
العنوان: High-throughput quantification of quasistatic, dynamic and spall strength of materials across 10 orders of strain rates
المؤلفون: Eswarappa Prameela, Suhas, Walker, Christopher C, DiMarco, Christopher S, Mallick, Debjoy D, Sun, Xingsheng, Hernandez, Stephanie, Sasaki, Taisuke, Wilkerson, Justin W, Ramesh, K T, Pharr, George M, Weihs, Timothy P
المساهمون: Army Research Laboratory, National Nuclear Security Administration
المصدر: PNAS Nexus ; volume 3, issue 5 ; ISSN 2752-6542
بيانات النشر: Oxford University Press (OUP)
سنة النشر: 2024
الوصف: The response of metals and their microstructures under extreme dynamic conditions can be markedly different from that under quasistatic conditions. Traditionally, high strain rates and shock stresses are achieved using cumbersome and expensive methods such as the Kolsky bar or large spall experiments. These methods are low throughput and do not facilitate high-fidelity microstructure–property linkages. In this work, we combine two powerful small-scale testing methods, custom nanoindentation, and laser-driven microflyer (LDMF) shock, to measure the dynamic and spall strength of metals. The nanoindentation system is configured to test samples from quasistatic to dynamic strain-rate regimes. The LDMF shock system can test samples through impact loading, triggering spall failure. The model material used for testing is magnesium alloys, which are lightweight, possess high-specific strengths, and have historically been challenging to design and strengthen due to their mechanical anisotropy. We adopt two distinct microstructures, solutionized (no precipitates) and peak-aged (with precipitates) to demonstrate interesting upticks in strain-rate sensitivity and evolution of dynamic strength. At high shock-loading rates, we unravel an interesting paradigm where the spall strength vs. strain rate of these materials converges, but the failure mechanisms are markedly different. Peak aging, considered to be a standard method to strengthen metallic alloys, causes catastrophic failure, faring much worse than solutionized alloys. Our high-throughput testing framework not only quantifies strength but also teases out unexplored failure mechanisms at extreme strain rates, providing valuable insights for the rapid design and improvement of materials for extreme environments.
نوع الوثيقة: article in journal/newspaper
اللغة: English
DOI: 10.1093/pnasnexus/pgae148
DOI: 10.1093/pnasnexus/pgae148/57173224/pgae148.pdf
الاتاحة: http://dx.doi.org/10.1093/pnasnexus/pgae148
https://academic.oup.com/pnasnexus/advance-article-pdf/doi/10.1093/pnasnexus/pgae148/57173224/pgae148.pdf
https://academic.oup.com/pnasnexus/article-pdf/3/5/pgae148/58480865/pgae148.pdf
Rights: https://creativecommons.org/licenses/by/4.0/
رقم الانضمام: edsbas.1382285F
قاعدة البيانات: BASE
الوصف
DOI:10.1093/pnasnexus/pgae148