Abstract
An addition of Ir to Ni base super alloy can increase the high temperature strength. An Ircontaining Ni base superalloy produced through a process of rapid solidification casting, solution heat treatment and subsequent aging was found to exhibit a compressive strength greater than 500 MPa at 1000°C, which suggested it would be a suitable material to use in a friction stir welding (FSW) tool for high-softening-temperature materials, such as stainless steels and carbon steels. Precision tilt casting of this Ir-containing Ni base superalloy into a copper mold followed by appropriate heat treatment, resulted in tools with a fine γ/γ' microstructure containing intergranular carbides. These tools were subsequently proven capable of producing welds on AISI 304 stainless steel and ultrahigh carbon steel without large deformation or severe wear.
Original language | English |
---|---|
Title of host publication | Friction Stir Welding and Processing VIII |
Publisher | Springer International Publishing |
Pages | 77-82 |
Number of pages | 6 |
ISBN (Electronic) | 9783319481739 |
ISBN (Print) | 9781119082491 |
DOIs | |
Publication status | Published - 2016 Jan 1 |
Keywords
- Friction stir welding
- Ir-containing ni base superalloy
- Mechanical properties
- Microstructure
- Stainless steel
ASJC Scopus subject areas
- Engineering(all)
- Materials Science(all)