The influence of maximum temperature of heating on the thermal fatigue of nickel heat-resistant alloys under thermocyclic tests

Abstract

The analysis of high temperature resistance alloys thermocyclic tests show that the lifetime Np is less when maximum temperature Тmax in test cycles (ΔТ=Тmax-Тmin) is more 900°С. In most test cases thermal cycle contents the plastic deformation. The cooling half-cycle includes three temperature intervals: first – where heating halfcycle compression stress decrease take place, second – where tension stresses are increased to yield stress σ02 and plastic deformation begin, and third interval - plastic deformation region, which is finished at minimum temperature of cycle Тmin. The stress decrease interval length depends from value of stress, which is reached in precede heating half-cycle and, as we consider, equal σ 02(Tmax). High temperature resistance alloys are characterized by yield stress σ 02 sharp decrease at temperatures which is more 900°С. Because at cooling from temperatures, which is lower 900°С, stresses, which must to decrease, are larger on one third them at 1000°С and on half them at 1100°С. Therefore third temperature interval is shorter at cooling from temperature which is more 900°С, plastic deformation is more and lifetime NP smaller.

About the authors

E. A. Tikhomirova

JSC “KLIMOV”, S.-Peterburg

Author for correspondence.
Email: tixomirova00@mail.ru

Candidate of Science (Engineering)

Engineer

Russian Federation

E. F. Sidokhin

Joint-Stock Company «KB X-ray Instruments», Saint-Petersburg

Email: esidohin@yandex.ru

Engineer

Russian Federation

References

  1. Dulnev R.A., Kotov P.I. Termicheskaya ustalost metallov [Thermal fatigue of metals] Moscow: Mashinostroenie Publ., 1980. 200 p.
  2. Rozenberg V.M. Polzuchest metallov [Creep of metals] Moscow: Metallurgiya Publ., 1967. 242 p.
  3. Shalin R.E., Svetlov I.L., Kachanov E.B., Toloraiya V.N., Gavrilin E.B. Monokristally nikelevykh garoprochnykh splavov [Single crystals of base-Ni superalloys]. Moscow: Mashinostroenie Publ., 1997. 336 p.
  4. Gecov L.B., Rubnikov A.I., Semenov A.S., Grigorev A.V., Tikhomirova E.A. The deformation resistance and fracture of single crystals at static and thermal-cyclic tests // Nadezhnost’ i Bezopasnost’ Energetiki. 2012. No. 3(18). P. 53-62. (In Russ.)
  5. Gecov L.B., Rubnikov A.I., Semenov A.S. Material development deformation at thermal-cyclic tests // Trudy NPO CKTI «Prochnost materialov I resurs elementov energooborudovaniya. V. 296. SPb.: NPO TsKTI Publ., 2009. P. 105-119. (In Russ.)
  6. Golubovskiy E.R., Bychkov N.G., Khamidullin A.Sh., Bazyleva O.A.
  7. The experimental estimation of thermal fatigue crystallographic anisotropy of Ni3Al singlecrystals for high- temperature details of AGTD // Vestnik dvigatelestroeniya. 2011. No. 2. P. 244-248. (In Russ.)
  8. Tikhomirova E.A., Azizov T.N., Sidokhin E.F. The influence of high temperature stand on heat resistance alloys thermal fatigue // Tekhnologiya metallov. 2013. No. 6. P. 34-37. (In Russ.)

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