✦ LIBER ✦

Cavitation Damage of the single-crystal nickel-base superalloy SRR99 during creep at 850°C

✍ Scribed by A. M. Hashem; D. Goldschmidt; Prof. Dr.-Ing. E. El-Magd

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 606 KB
Volume: 25
Category: Article
ISSN: 0933-5137
DOI: 10.1002/mawe.19940250310

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Various heat treatments of the single‐crystal nickel‐base superalloy SRR99 have been carried out to produce a wide range of initial γ′ phase morphology. The cavitation damage has been studied after creep fracture at 850°C and stresses between 400MPa and 650 Mpa. The crep fracture surfaces and longitudinal sections of crept specimens have been examined by image analysing system in order to determine the size distribution and the area fraction of (001)‐planes cracks on fracture surface characterise the creep crack damage level. The cracking morphology in fractured material as a function of stress and γ′‐phase size has also been investigated.

The results show, that crack propagation occurred anisotropically on (001) crystallographic planes perpendicular to the aplied stress along the γ/γ′ interfaces. It was found, that creep cracks dependent on the shape and size of γ′‐phases developing at the temperature and stress level.

📜 SIMILAR VOLUMES

On the role of the internal stress durin

On the role of the internal stress during non-isothermal creep life of a first generation nickel based single crystal superalloy

✍ X. Milhet; J. Cormier; A. Organista 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 965 KB

Modelling and analysis of the oxidation

Modelling and analysis of the oxidation influence on creep behaviour of thin-walled structures of the single-crystal nickel-base superalloy René N5 at 980 °C

✍ Matthias Bensch; Johannes Preußner; Rainer Hüttner; Georgia Obigodi; Sannakaisa 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 736 KB

Investigations of the thermal fatigue be

Investigations of the thermal fatigue behaviour of single-crystal nickel-based superalloys SRR 99 and CMSX-4: Meyer-Olbersleben, F., Rezai-Aria F. and Goldschmidt, D. Proc. Conf. Superalloys 1991, Champion, Pennsylvania, USA, 20–24 Sept. 1992 (The Minerals, Metals & Materials Society, 420 Commonwealth Dr., Warrendale, PA 15086, USA) 1992 pp 785–794

📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 178 KB

Influence of orientation on the fatigue

Influence of orientation on the fatigue and creep behaviour of a single crystal nickel base superalloy: Smith, D.J., Shu-Xin, L. and Ellison, G.E. Proc. Conf. Creep: Characterization, Damage and Life Assessments, Lake Buena Vista, Florida, USA, 18–21 May 1992 (ASM International, Materials Park, Oh, USA, 1992) pp 603–608

📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 176 KB