Ductile-brittle transition temperature measurement of temper embrittled Ni-Cr steels by means of small punch tests
The ductile-brittle transition temperatures of Ni-Cr steels having various degrees of intergranular embrittlement and various microstructures were determined by means of small punch tests. The measured values were compared with those obtained from Charpy impact and uniaxial tensile tests. The effects of punch tip shape, notch, and strain rate on the ductile-brittle transition behaviors were examined. It was found that the combined use of a notch, high strain rates and a small punch tip strongly affects the ductile-brittle transition behavior. Considerable variations of the data were observed when the small punch tests were performed on coarse-grained steels. Several factors controlling embrittlement measurements of steels are discussed in terms of brittle fracture mechanisms.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6971534
- Report Number(s):
- IS-M-474; CONF-8309170-7; ON: DE84012833
- Resource Relation:
- Conference: Symposium on the use of nonstandard subsized specimens for irradiated testing, Albuquerque, NM, USA, 23 Sep 1983; Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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