Published 2000
| Version v1
Journal article
Creep behavior of NiTi shape memory alloys and the effect of pre-creep on the martensitic phase transformation
Creators
- 1. Bochum Univ. (Germany). Inst. fuer Werkstoffe
Description
The paper reports creep data of a Ni-rich NiTi-alloy at stresses and temperatures in the range of 500 C and 150 MPa. The apparent activation energy for creep and the creep stress exponent were found to be 421 kJ/mole and 5. Tempering and pre-creep result in a 20 C increase of phase transformation temperatures (PTTs). The effect of an additional plastic deformation (as compared to a stress free aging treatment) is that PTT-peaks broaden and overlap on cooling and broaden on heating. This can only be rationalized on the basis of a difference in microstructures between the tempered and pre-crept materials. (orig.)
Additional details
Publishing Information
- Journal Title
- Materials Science Forum
- Journal Volume
- 327-328
- Journal Page Range
- p. 183-186
- ISSN
- 0255-5476
- CODEN
- MSFOEP
Conference
- Title
- International symposium and exhibition on shape memory materials (SMM '99)
- Dates
- 19-21 May 1999
- Place
- Kanazawa (Japan)
INIS
- Country of Publication
- Switzerland
- Country of Input or Organization
- Switzerland
- INIS RN
- 31024989
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CALORIMETRY; CREEP; DEFORMATION; MARTENSITIC STEELS; NICKEL ALLOYS; SHAPE MEMORY EFFECT; TEMPERING; TITANIUM ALLOYS; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; ELECTRON MICROSCOPY; HEAT TREATMENTS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; MICROSCOPY; STEELS; TRANSITION ELEMENT ALLOYS
Optional Information
- Notes
- 5 refs.