Creep in a nickel base 16Cr10W4MoTiAl heat resistant alloy

✍ Scribed by M. Pahutová; V. Šustek; J. Čadek

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 817 KB
• Volume: 165
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(93)90743-x

✦ Synopsis

Creep in a nickel base 16Cr-10W-4Mo-TiAI heat resistant alloy has been investigated in a broad region of temperatures and applied stresses with the aim of identifying dislocation mechanisms that control creep rate at various external conditions. The results such as applied stress and temperature dependence of steady state creep rate, measured internal stress in addition to dislocation density are presented. Published results of structure investigation both prior to as well as after creep are summarized. An attempt is made to describe the creep in the alloy in terms of the back stress, assuming lattice diffusion as the creep rate controlling process. It is shown that under proper assumptions, the back stress concept leads to acceptable results although it provides an essentially phenomenological interpretation of creep. The possible physical nature of the back stress in creep and/or possible creep rate controlling mechanisms are briefly discussed. Ce 0.025 a aAs added.