Temperature Measurement in the Rotary Forming Process of a Nickel Superalloys (INCONEL) Sheet during Induction Heating

Abstract

The processes of spinning and flow forming of hard metal sheets made from nickel superalloy INCONEL can be realized cold or with heating - e.g. by a induction or laser. When metal sheet is heated it is necessary to measure the temperature field on heated area, because its determines the deformation susceptibility. To control the temperature field pyrometers and infrared cameras are used. Due to strong changes in the surface of a formed material, under temperature influence (oxidation) and the action of the forming rolls, it is necessary to determine the emissivity coefficient values as a function of temperature and surface conditions. The paper presents the concept of determining these values, as well as an alternative technique for measuring temperature field, based on the methods of image analysis.

Investigation of the Mechanical Properties and Microstructure of Nickel Superalloys Processed in Shear Forming / Identyfikacja Właściwości Mechanicznych Oraz Mikrostruktury Superstopów Niklu Przetwarzanych W Procesie Kształtowania Obrotowego

“…For this purpose, the uniaxial tensile test according to the standard [14]. The study was carried out using a static machine Zwick/ Roell Z050.…”

“…Due to the specific properties of Inconel alloys, which are a high deformation resistance, caused by a high intensity of strengthening and high temperature of recrystallization, design forming processes for these alloys is a complex task. There are being attempts of plastic forming at elevated temperatures [13][14]. Both in the process carried out cold, as well as elevated temperature, there are a number of faults in the form of free and cylindrical part waves, peripheral and radial cracks, resulting The paper presents the research results of the mechanical properties and microstructure of the material in initial state and parts made from nickel superalloy Inconel ® 718 in the rotary forming process with laser heating.…”

Microstructure and Mechanical Properties of Solid-State Rotary Friction Welded Inconel 713C and 32CrMo4 Steel Joints Used in a Turbocharger Rotor

“…Ni-based superalloys are a wide group of materials subjected to friction welding. There are two broad categories of nickel alloys: precipitation-hardened alloys and solid-solution-strengthened alloys [ 31 , 32 ]. Nickel alloys in both categories can be welded using common processes [ 33 ].…”