Tensile properties of a thermomechanically processed ductile iron

ISSN： 1543-1940

Source： Metallurgical and Materials Transactions A, Vol.28, Iss.5, 1997-05, pp. : 1213-1218

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

A ductile cast iron was continuously hot-and-warm-rolled or one-step-forged from a temperature in the austenite range (900 °C to 1100 °C) to a temperature below the A ₁ temperature. Various amounts of reduction were used (from 60 to more than 90 pct). Tensile properties including tensile strength and total elongation were measured along the directions parallel and transverse to the rolling direction and along the direction transverse to the forging direction. The tensile ductility and strength both increase with a decrease in the amount of hot-and-warm working (HWW). Compared with the results obtained by other investigators, the present results showed higher strengths and ductilities over the same range of reduction in thickness. The improvement in properties is related to the lower temperature of the postprocessing heat treatment given in this study (600 °C) compared to other studies (900 °C). The low temperature of heat treatment leads to a structure of fine graphite in a matrix of ferrite and carbides, whereas the high temperature of heat treatment leads to coarse graphite in a matrix of carbide-free ferrite. The delay in failure from the presence of the small graphite constituent results in an increase in tensile ductility with an accompanying increase in tensile strength.

Related content

Tensile properties of copper alloyed austempered ductile iron: Effect of austempering parameters

By Batra U. Ray S. Prabhakar S.

Journal of Materials Engineering and Performance, Vol. 13, Iss. 5, 2004-10 ,pp. : 537-541 (5)

Springer Publishing Company

Access to resources Recommend Favorite

Tensile properties of austempered ductile iron under thermomechanical treatment

By Achary J.

Journal of Materials Engineering and Performance, Vol. 9, Iss. 1, 2000-02 ,pp. : 56-61 (6)

Springer Publishing Company

Access to resources Recommend Favorite

Tensile, Compression and Fracture Properties of Thick-Walled Ductile Cast Iron Components

By Minnebo P. Nilsson K.-F. Blagoeva D.

Journal of Materials Engineering and Performance, Vol. 16, Iss. 1, 2007-02 ,pp. : 35-45 (11)

Springer Publishing Company

Access to resources Recommend Favorite

Tensile strength of thermomechanically processed Cu-9Ni-6Sn alloys

By Rhu Jae Kim Sang Jung Yun Han Seung Kim Chang

Metallurgical and Materials Transactions A, Vol. 30, Iss. 10, 1999-10 ,pp. : 2649-2657 (9)

Springer Publishing Company

Access to resources Recommend Favorite

Influence of intercritical austenitising, tempering time and martensite volume fraction on the tensile properties of ferritic ductile iron with dual matrix structure

By Erdogan M. Cerah M. Kocatepe K.

International Journal of Cast Metals Research, Vol. 19, Iss. 4, 2006-09 ,pp. : 248-253 (6)

Maney Publishing

Access to resources Recommend Favorite