IN SITU TEM STUDY ON THE R-PHASE TRANSFORMATION IN TiNi ALLOY

Acta Metallurgica Sinica (English Letters) ›› 1996, Vol. 9 ›› Issue (3): 157-163.

• Research paper • Next Articles

IN SITU TEM STUDY ON THE R-PHASE TRANSFORMATION IN TiNi ALLOY

CHEN Qing; WU Xingfang and C. J. Humphreys(Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China)(Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CBZ 3QZ, U. K.)Manuscript received 30 November 1995; in revised form 17 April 1995

Received:1996-06-25 Revised:1996-06-25 Online:1996-06-25 Published:2009-10-10

Abstract

Abstract: The R-phase transformation process in selected TiNi alloys has been studied in great detail by using in situ TEM technique. The R-phase transformation was found to be a reversible thermoelastic displacive transformation with a nucleation and growth process. The R-phase nucleates at the precipitate/matrix interface in aged specimens and grows by moving the coherent R/matrix interfaces. The stress field of Ti3Ni4 precipitates plays a much more important role in the formation of the R-phase than dislocations in aged TiNi alloy. The microstructure of the R-phase has also been studied.

Key words: R-phase transformation, TiNi alloy, in situ TEM

[1]	Jing-Hua Liu, Jin-Jun Liu, Qiang Zheng, Bao-Ru Bian, Juan Du. In Situ Transmission Electron Microscopy Observations of the Growth Process of Fe₃O₄-Ag Nanoparticles [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(9): 1283-1288.
[2]	Hui Wang, Shang-Gang Xiao, Tao Zhang, Qiang Xu, Zeng-Qian Liu, Meng-Yue Wu, Frans Tichelaar, Henny Zandbergen. Direct TEM Observation of Phase Separation and Crystallization in Cu₄₅Zr₄₅Ag₁₀ Metallic Glass [J]. Acta Metallurgica Sinica (English Letters), 2016, 29(6): 538-545.
[3]	Xi-Feng Li, Wei Ding, Jian Cao, Li-Yan Ye, Jun Chen. In Situ TEM Observation on Martensitic Transformation during Tensile Deformation of SUS304 Metastable Austenitic Stainless Steel [J]. Acta Metallurgica Sinica (English Letters), 2015, 28(3): 302-306.
[4]	Anna Churakova, Dmitry Gunderov, Alexander Lukyanov, Niklas Nollmann. Transformation of the TiNi Alloy Microstructure and the Mechanical Properties Caused by Repeated B2-B19′ Martensitic Transformations [J]. Acta Metallurgica Sinica (English Letters), 2015, 28(10): 1230-1237.

IN SITU TEM STUDY ON THE R-PHASE TRANSFORMATION IN TiNi ALLOY

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 4

Recommended Articles

Metrics

Comments