High‑temperature failure and microstructural investigation of wire‑arc additive manufactured Rene 41

Date

2023-01-11

Advisors

Journal Title

Journal ISSN

Volume Title

Publisher

Springer

Department

Type

Article

ISSN

0268-3768

item.page.extent-format

Citation

James W, Ganguly S, Rodrigues Pardal G. (2023) High‑temperature failure and microstructural investigation of wire‑arc additive manufactured Rene 41, The International Journal of Advanced Manufacturing Technology, Volume 125, Issue 5-6, March 2023, pp. 2485–2501

Abstract

In developing a wire-arc plasma direct energy deposition process for creep-resistant alloys used in high-speed flight applications, structures were built from nickel-based superalloy Rene 41. Samples of additive manufacturing (AM) material were analysed for their microstructural and mechanical properties, in both as-deposited (AD) and heat-treated (HT) conditions. Tensile specimens were tested at room temperature, 538, 760, and 1000 °C. Macroscopically, large columnar grains made up of a typical dendritic structure were observed. Microscopically, significant segregation of heavier elements, grain boundary precipitates, and secondary phases were observed, with key differences observed in HT material. There was a clear distinction between failure modes at different testing temperatures and between AD and HT variants. A fractographic investigation found a progressive move from brittle to ductile fracture with increasing testing temperature in both AD and HT conditions, as well as microstructural features which support this observation.

Description

item.page.description-software

item.page.type-software-language

item.page.identifier-giturl

Keywords

Additive manufacturing, Direct energy deposition, Mechanical properties, Fractography, Microstructure, Rene 41

Rights

Attribution 4.0 International

item.page.relationships

item.page.relationships

item.page.relation-supplements