S. V. Afanasiev, E. G. Volkova, V. V. Sagaradze

THE STRUCTURE AND PROPERTIES OF HARDENED STAINLESS STEELS WITH A SHAPE MEMORY EFFECT

A possibility of obtaining the shape memory effect has been investigated as a result of γ→ε→γ transformations in stainless steels hardened by VC carbides. Age hardening conditions at 650 and 720 °C for stainless steels containing (in mass %) 0.20 – 0.35 C, 1 V, 3 – 4 Si, 9 and 13 – 14 Cr are presented. The values of reversible strain e determined after heating to 400 °C in specimens preliminarily deformed by 3.5 – 4 % vary from 0.15 to 2.7 % depending on the composition of the steels and the conditions of stabilizing and destabilizing aging.

References:

1. Sagaradze V.V., Belozerov Ye.V., Pecherkina N.L., Mukhin M.L., Zaynutdinov Yu.R. The shape memory effect in high-strength precipitation-hardening austenitic steels. Materials Science and Engineering: A, 2006, vol. 438–440, pp. 812–815. DOI: 10.1016/j.msea.2006.01.113.
2. Sagaradze V.V., Belozerov E.V., Mukhin M.L., Zainutdinov Yu.R., Pecherkina N.L., Zavalishin V.A. A new approach to creation of high-strength austenitic steels with a controlled shape-memory effect. The Physics of Metals and Metallography, 2006, vol. 101, iss. 5, pp. 506–512. DOI: 10.1134/S0031918X06050127.
3. Sagaradze V.V., Mukhin M.L., Belozerov E.V., Zainutdinov Yu.R., Pecherkina N.L., Filippov Yu.I. Controlled shape memory effect in high strength Mn and Cr-Mn steels. Materials Science and Engineering: A, 2008, vol. 481–482, pp. 742–746. DOI:10.1016/j.msea.2007.02.155.
4. Sagaradze V.V., Kositsyna I.I., Muкhin M.L., Belozerov E.V., Zaynutdinov Yu.R. Highstrength precipitation-hardening austenitic Fe-Mn-V-Mo-C steels with shape memory effect. Materials Science and Engineering: A, 2008, vol. 481–482, pp. 747–751. DOI: 10.1016/j.msea.2007.02.158.
5. Sagaradze V.V., Voronin V.I., Filippov Yu.I., Kazantsev V.A., Mukhin M.L., Belozerov E.V., Pecherkina N.L., Kataeva N.V., Popov A.G. Martensitic transformations γ-ε(α) and the shape-memory effect in aging high-strenght manganese austenitic steels. The Physics of Metals and Metallography, 2008, vol. 106, iss.6, pp 630–640. DOI: 10.1134/S0031918X08120120.
6. Sagaradze V. V., Afanas'ev S. V., Kataeva N. V. Shape memory effect in Mn-V-C austenitic steels involving deformation reorientation of ε-martensite. The Physics of Metals and Metallography, 2013, vol. 114, iss. 4, pp. 322–326. DOI: 10.1134/S0031918X13020117.
7. Gavriljuk V.G., Bliznuk V.V., Shanina V.D., Kolesnik S.P. Effect of silicon on atomic distribution and shape memory in Fe-Mn base alloys. Materials Science and Engineering: A, 2005, vol. 406, iss. 1–2, pp. 1–10. DOI: 10.1016/j.msea.2005.05.043.
8. Baruj A., Kikuchi T., Kajivara S., Shinya N. Improved shape memory properties and internal structures in Fe-Mn-Si-based alloys containing Nb and C. J. Phys. IV France, 2003, vol. 112, pp. 373–376. DOI: 10.1051/jp4:2003904.
9. Dong Z.Z., Kajiwara S., Kikuchi T., Sawaguchi T. Effect of pre-deformation at room temperature on shape memory properties of stainless type Fe-15Mn-5Si-9Cr-5Ni-(0.5-l .0)NbC alloys. Acta Materialia, 2005, vol. 53, iss. 15, pp. 4009–4018. DOI: 10.1016/j.actamat.2005.04.035.
10. Malyshev K.A., Vasilevskaya M. A change in the physical properties of martensite in titanium-alloyed iron-nickel alloys under tempering. Fizika Metallov i Metallovedenie, 1964, vol. 18, no. 5, pp. 793–795. (In Russian).
11. Sagaradze V.V., Uvarov A.I. Uprochnenie i svoistva austenitnykh stalei [Hardening and Properties of Austenitic Steels]. Ekaterinburg, RIO UO RAS Publ., 2013, 720 p. (In Russian).
12. Romanova R.R., Pushin V.G., Uksusnikov A.N., Buinov N.N. Strukturnyy mekhanizm stareniya austenitnykh zhelezomargantsevykh i zhelezonikelevykh stalei, uprochnyaemykh karbidom vanadiya. In: Struktura i svoistva nemagnitnykh stalei [Structure and Properties of Non-Magnetic Steels]. M., Nauka Publ., 1982, pp. 107–114.
13. Van Aswegen J.S.T., Honeycombe R.W.K. Segregation and precipitation in stacking faults. Acta Metallurgica, 1962, vol.10, iss. 3, pp. 262–264.

Article reference