October AMP_Digital

4 Editorial 6 Research Tra cks 6 Feedback 7 OMG! 8 Metals/Polymers/Ceramics 10 Testing/Characterization 12 Emerging Technology 13 Energy Trends 14 Nanotechnology 46 Stress Relief 47 Classifieds 47 Editorial Preview 47 Special Advertising Sectio n 47 Advertisers Index 48 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. AdvancedMaterials & Processes (ISSN 0882-7958, USPS 762080) publishes eight issues per year: January, February/ March, April, May/June, July/August, September, October, andNovember/December, by ASM International, 9639 Kinsman Road, Materials Park, OH 44073-0002; tel: 440.338.5151; fax: 440.338.4634. Periodicals postage paidat Novelty, Ohio, and additional mailing offices. Vol. 176, No. 7, OCTOBER 2018. Copyright © 2018 by ASM International ® . All rights reserved. Distributed at no charge to ASMmembers in the United States, Canada, andMexico. International members can pay a $30 per year surcharge to receive printed issues. Subscriptions: $475. Single copies: $51. POSTMASTER: Send3579 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. Printedby Publishers Press Inc., Shepherdsville, Ky. 21 NONLINEAR MODELS SPEED DEVELOPMENT OF CROSS-LINKED POLYETHYLENE FOAM Abhay Bulsari and Markku Talja Relating composition, process, and dimensional variables with materials properties using nonlinear modeling provides a valuable tool for efficient materials and product development. 26 EXTRACTING RARE EARTH ELEMENTS FROM COAL-BASED MATERIALS Mary Anne Alvin Rising concern among industrialized nations has driven a resurgence of global interest in rare earth element mineral exploration and extraction as well as related research on supply, demand, utilization, recycling, reuse, and substitution. 30 NOVEL POLYMERS FOR USE IN TOTAL JOINT ARTHROPLASTY Sudipta Seal, Sushant Singh, Kaitlyn Crawford, Elizabeth Brisbois, and Melanie Coathup Improving the mechanical properties and wear resistance of polymers used as implant bearing materials requires new approaches and modern technology. FEATURES OCTOBER 2018 | VOL 176 | 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 1 8 3 21 4930 12