October_2021_AMP_Digital

4 Editorial 5 Research Tracks 6 Machine Learning 7 Metals/Polymers/Ceramics 9 Testing/Characterization 11 Process Technology 12 Emerging Technology 13 Sustainability 66 Stress Relief 67 Editorial Preview 67 Special Advertising Section 67 Advertisers Index 68 3D PrintShop TRENDS INDUSTRY NEWS DEPARTMENTS Check out the Digital Edition online at asminternational.org/news/magazines/am-p ASM International serves materials professionals, nontechnical personnel, and managers wordwide by providing high-quality materials information, education and training, networking opportunities, and professional development resources in cost-effective and user-friendly formats. ASM is where materials users, producers, and manufacturers converge to do business. Advanced Materials & Processes (ISSN 0882-7958, USPS 762080) publishes eight issues per year: January, February/ March, April, May/June, July/August, September, October, and November/December, by ASM International, 9639 Kinsman Road, Materials Park, OH 44073-0002; tel: 440.338.5151; fax: 440.338.4634. Periodicals postage paid at Novelty, Ohio, and additional mailing offices. Vol. 179, No. 7, OCTOBER 2021. Copyright © 2021 by ASM International ® . All rights reserved. Distributed at no charge to ASMmembers in the United States, Canada, and Mexico. International members can pay a $30 per year surcharge to receive printed issues. Subscriptions: $499. Single copies: $54. POSTMASTER: Send 3579 forms to ASM International, Materials Park, OH 44073-0002. Change of address: Request for change should include old address of the subscriber. Missing numbers due to “change of address” cannot be replaced. Claims for nondelivery must be made within 60 days of issue. Canada Post Publications Mail Agreement No. 40732105. Return undeliverable Canadian addresses to: 700 Dowd Ave., Elizabeth, NJ 07201. Printed by Publishers Press Inc., Shepherdsville, Ky. 19 TECHNICAL SPOTLIGHT FERRIUM C64: A 21 ST CENTURY STEEL TAKES FLIGHT Ferrium C64 is the culmination of a rigorous design process that bypassed extensive physical experimentation— delivering a carburizable steel with unmatched capability. 23 GELATIN METHACRYLATE HYDROGELS FOR 3D BIOPRINTING Pete Gabriel L. Ledesma, Kai-Hung Yang, and Roger J. Narayan Because the photopolymerization of gelatin methacrylate can be spatially and temporally controlled, it can be fabricated into hydrogels well suited to a variety of biomedical applications. 28 SUSTAINABLE MATERIALS AND THE CIRCULAR ECONOMY Tamil Selvan Sakthivel, Seeram Ramakrishna, and Sudipta Seal The circular economy and sustainability are multifaceted concepts and thus should be pursued through collective advancements across various scientific fields. FEATURES OCTOBER 2021 | VOL 179 | NO 7 A D V A N C E D M A T E R I A L S & P R O C E S S E S | O C T O B E R 2 0 2 1 3 19 35 28 23 35 SMST NEWSWIRE The official newsletter of the International Organization on Shape Memory and Superelastic Technologies (SMST). This biannual supplement covers shape memory and superelastic technologies for biomedical, actuator applications, and emerging markets, along with SMST news and initiatives.