Austenitic high-manganese steels (HMnS) offer very high wear resistance under dynamic loading due to their work hardening capacity. However, static abrasive is limited. Various approaches increasing abrasion are known from traditionally manufactured metallurgical components. These confirm the potential for surface protection applications. In this work, powder of Hadfield HMnS X120Mn12 prepared ...

در این پژوهش تقویت باریکه لیزر تپی فمتوثانیه Ti:sapphire ­کننده بازتولیدی با آرایش هندسی Z براساس روش تپ چیرپ بررسی شده است. برای انتقال ورودی اولیه به داخل کاواک و استخراج از دو سلول پاکل استفاده زمان شکل‌گیری برحسب انرژی دمش مطالعه روند تحول مورد قرار گرفته مدت تولید بدون حضور 80 نانوثانیه فرایند 38 نرخ تکرار 10 هرتز طول موج مرکزی 800 نانومتر بیشینه 2 میلی‌ژول بعد 17 رفت برگشت 15 میلی ژول 532...

Wear resistant coatings that comply with non-toxic environment goals are highly desirable. Cr 3 C 2 –NiCr is a promising alternative to the toxic, ‘Co’- containing WC–Co mitigate wear. The purpose of this study was examine suitability for automotive brake disc application by systematically investigating their dry sliding wear behavior at different test conditions. Therefore, High Velocity Air F...

Abstract The dry sliding behavior of three commercial friction materials (codenamed FM1, FM2, and FM3) tested against a Co-free cermet coating produced by high-velocity oxy-fuel (HVOF) on gray cast-iron discs is investigated. FM1 conventional low-metallic material, FM2 developed for using HVOF-coated discs, FM3 Cu-free material with low content abrasives relatively high concentration steel fibe...

Abstract Automotive brake rotors are commonly made from gray cast iron (GCI). During usage, gradually worn off and periodically replaced. Currently, replaced mostly remelted to produce brand-new products, resulting in a relatively high energy consumption carbon footprint into the environment. In addition, automotive brakes emit airborne particles. Some of emitted particles categorized as ultraf...