منابع مشابه
Effect of age hardening on corrosion resistance and hardness of CoCrMo alloys used in dental engineering
Purpose: The goal of the study is to research the effect of various time of ageing on corrosion resistance, hardness and structures of Remanium 2000+ Co-Cr-Mo alloys used in prosthodontia. Design/methodology/approach: To investigation was prepared mould, cast in 1430°C and realized the heat treatment: solutioning in 1250°C by 3 hours and then ageing in 850°C by 4, 8, 16 and 24 hours. Electroche...
متن کاملEffect of EFO parameters on Cu FAB hardness and work hardening in thermosonic wire bonding
Effects of the electrical flame off (EFO) parameters on the hardness and work hardening properties of Cu free air balls (FABs) are reported and compared to those of Au. Cu FABs were characterised using an online deformability method that measures the insitu deformability of the Cu FAB and by traditional off-line Vickers microhardness testing of cross-sectioned samples. The online deformability ...
متن کاملExperimental Studies on the Microstructure and Hardness of Laser Transformation Hardening of Low Alloy Steel
An experimental investigation with Nd:YAG laser system was carried out to study the effects of laser hardening process parameters on the microstructure and hardness during laser hardening of EN25 steel. The laser beam is allowed to scan on the surface of the work piece by varying the laser beam power (750–1250 W) and travel speed (500–1000 mm/min) of the work table. The microstructural features...
متن کاملEffect of Overage Hardening Heat Treatment on the Micro Structure and Hardness of Nickel-based Super Alloy Rene-80
Rene-80 nickel-base superalloy as an alloy for production of the jet turbine blades shows high mechanical properties as well as microstructure stability during the high temperature engine operation. In this research, age hardening heat treatment cycle was done on the as-cast Rene-80 superalloy. In the following, microstructure, elemental analysis of phases and macro-hardness of the alloy before...
متن کاملA Fuzzy Logic Approach for Optimization of Hardness in Induction Hardening Process
The study finds the effect of different input parameters that are feed rate, dwell time, current and gap between the induction coil & work-piece on the output parameters that are Hardness at rolled {H(R)}, Normalized {H(N)} and Hardened Tempered {H(T)} conditions of the material (AISI 1040 steel). The degree of membership function of an object in a fuzzy set is defined by membership functions (...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Scientific American
سال: 1917
ISSN: 0036-8733
DOI: 10.1038/scientificamerican11171917-318supp