• I Made Wicaksana Ekaputra Universitas Sanata Dharma Yogyakarta



Alloy 800H, Serrated Yielding, Superalloy


Detailed information about the mechanical properties of components in the power plant was crucial in process design. One essential piece of information was the characteristics of the material at various temperatures in a tension load. In this study, the tensile test was applied to the Alloy 800H with various temperatures ranging from 24oC to 900oC at a constant deformation rate of 10-4/s. Alloy 800H was a promising candidate for components in power plants due to its high corrosion resistance in a high-temperature environment. A test was conducted by following the ASTM E8 and ASTM E21. The tensile apparatus was equipped with a furnace, and a thermocouple was attached to the specimen surface of the cylindrical during the test. The data was recorded by the data acquisition connected to the PC. This preliminary study aimed to determine the serrated yielding area that occurred based on several data from tensile test results.

Author Biography

I Made Wicaksana Ekaputra, Universitas Sanata Dharma Yogyakarta

Lecturer at Universitas Sanata Dharma Yogyakarta


DEWA, R.T., KIM, S.J., KIM, W.G., KIM, E.S., “Uniaxial low-cycle fatigue study of Alloy 800H Weldments at 700oC”, Metals, v.8, n.918, pp.1-16, Nov. 2018.

REN, W., SWINDEMAN, R., “A review of Alloy 800H for applications in the Gen IV nuclear energy systems”, in: Proceedings of the ASME 2010 Pressure Vessels & Piping Division, pp. 1-16, USA, Jul 2010

EKAPUTRA, I.M.W., “Prediksi laju perambatan retak melar pada baja Austenitik 316L menggunakan data uji melar dan metode NSW”, Jurnal Rekayasa Mesin, v.10, n.2, pp. 185-192, Aug. 2019.

EKAPUTRA, I.M.W., KIM, W.G., PARK, J.Y., KIM, S.J., KIM, E.S., “Influence of dynamic strain aging on tensile deformation behavior of Alloy 617”, Nuclear Engineering and Technology, v. 48, n. 6, pp. 1387-1395, Dec. 2016.

EKAPUTRA, I.M.W., KIM, W.G., PARK, J.Y., KIM, KIM, Y.W., “Analysis of the creep crack growth rate for modified 9Cr-1Mo steel using Q* parameter”, Journal of Mechanical Science and Technology, v. 28, n. 10, pp. 4075-4081, Oct. 2014.

GOSH, A. K., On the measurement of strain-rate sensitivity for deformation mechanism in conventional and ultra-fine grain alloys”, Materials Scientific Engineering A. v.463, n.1-2, pp. 36–40, Aug. 2007.

SAHA, G. G., MCCORMICK, P. G., RAO, P.R., “Portevin-Le Chatelier effect in an Al-Mn alloy II: yield transition and strain rate sensitivity measurements”, Materials Science and Engineering, v.62, n.2, pp. 197-203, 1984.

TAMIMI, S., CAMPOS, A.A., CRUZ, J.P.D., “Modelling the Portevin-Le Chatelier effects in aluminium alloys: a review”, Journal of Mechanical Behaviour Materials. v.24, n.3–4, pp. 67–78. 2015.

PICU, R. C., “A mechanism for the negative strain-rate sensitivity of dilute solid solutions”, Acta Materialia. v.52, n.12, pp. 3447–3458, Jul. 2004.

Reza Sharghi-Moshtaghin, and Sirous Asgari, 2008, “The Characteristics of Serrated Flow in Superalloy IN738LC”, Materials Science and Engineering A, 486, 376-380.

G. G. Saha, P. G. McCormick, and P. Rama Rao, 1984, “Portevin-Le Chatelier Effect in an Al-Mn Alloy I: Serration Characteristics”, Materials Science and Engineering, 62, 187-196.

P. Rodriguez, 1984, “Serrated Plastic Flow”, Bull. Mater. Sci., 6(4), 653-663.

Jae-Hoon Nam, Seon-Keun Oh, Myeong-Heom Park, Young- Kook Lee, 2021, “The Mechanism of Dynamic Strain Aging For Type A Serrations In Tensile Curves Of a Medium-Mn Steel”, Acta Materiala, 206, 1-10.

ASTM E8 / E8M-21, “Standard test methods for tension testing of metallic materials”, ASTM International, West Conshohocken, PA, 2021.

ASTM E21-20, “Standard test methods for elevated temperature tension tests of metallic materials”, ASTM International, West Conshohocken, PA, 2020.

KAOUMI, D., HRUTKAY, L., “Tensile deformation behavior and microstructure evolution of Ni-based superalloy 617”, Journal of Nuclear Materials, v.454, n.1-3, pp. 265-273, Nov. 2014.