Author: MN. Srinivasan
Publisher:
ISBN:
Category : Austempering temperature
Languages : en
Pages : 6
Book Description
Statistical design of experiments was employed to study the effect of austenitizing temperature, austempering temperature, and austempering time on the quasi-static and dynamic fracture toughness of austempered ductile iron of a standard composition. Regression equations were developed to determine the relative significance of the variables in affecting the quasi-static and dynamic fracture toughness of the austempered iron studied.
Effect of Austempering Variables on the Quasi-Static and Dynamic Fracture Toughness of Austempered Ductile Iron
Dynamic Fracture Toughness of Austempered Ductile Irons
Influence of Austempering Time and Temperature on the Fracture Toughness of Austempered Ductile Iron (ADI)
Austempered Ductile Iron: Processing and Mechanical Properties
Author: Ranjit Kumar Panda
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659697043
Category :
Languages : en
Pages : 124
Book Description
Even since its discovery in 1948, the use of ductile iron is increasing continuously, this is due to the combination of its various excellent mechanical properties. Excessive amount of research is being carried out to develop even better properties. Austempererd ductile iron is the most recent development in the area of ductile iron or S.G. iron. This is formed by an isothermal heat treatment of the ductile iron. The newly developed austempered ductile iron is now replacing steel in many fields so it has becoming very important to various aspects of this material. In the present work the effect of copper along with the process variables (austempering temperature and austempering time) on the properties (Hardness, Tensile strength and Elongation) and microstructure of ductile iron is studied. With increasing austempering time hardness, tensile strength and elongation are increasing but with increasing austempering temperature hardness and tensile strength are decreasing and elongation increasing. Austempered ductile iron with copper is showing some higher strength, hardness and lower elongation than the austempered ductile iron without copper. In microstructure ferrite is increasing
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659697043
Category :
Languages : en
Pages : 124
Book Description
Even since its discovery in 1948, the use of ductile iron is increasing continuously, this is due to the combination of its various excellent mechanical properties. Excessive amount of research is being carried out to develop even better properties. Austempererd ductile iron is the most recent development in the area of ductile iron or S.G. iron. This is formed by an isothermal heat treatment of the ductile iron. The newly developed austempered ductile iron is now replacing steel in many fields so it has becoming very important to various aspects of this material. In the present work the effect of copper along with the process variables (austempering temperature and austempering time) on the properties (Hardness, Tensile strength and Elongation) and microstructure of ductile iron is studied. With increasing austempering time hardness, tensile strength and elongation are increasing but with increasing austempering temperature hardness and tensile strength are decreasing and elongation increasing. Austempered ductile iron with copper is showing some higher strength, hardness and lower elongation than the austempered ductile iron without copper. In microstructure ferrite is increasing
Evaluation of the Fracture Toughness of Ductile Iron Using Fatigue Precracked Charpy, Dynamic Tear, and Compact Tension Specimens
Author: WL. Bradley
Publisher:
ISBN:
Category : Ductile iron
Languages : en
Pages : 14
Book Description
The fracture toughness of ductile iron has been studied using dynamic tear, fatigue precracked (FPC) Charpy, and compact tension (CT) specimens. Specimens were fractured both quasi-statically and dynamically. Initial crack extension was found to occur at maximum load for both the compact tension specimens and the FPC Charpy specimens. However, initial crack extension occurred prior to maximum load for the dynamic tear specimens. Upper-shelf KJIc values determined from the compact tension specimens and the FPC Charpy specimens were similar (83 and 76 MPa ?m) while the J-value at maximum load for the dynamic tear specimens was found to fit nicely on the J-R curve from the CT specimens. The shift in ductile-to-brittle transition temperature with strain rate (comparing quasi-static with impact loading) was similar to what has been observed for structural steel with a similar yield strength.
Publisher:
ISBN:
Category : Ductile iron
Languages : en
Pages : 14
Book Description
The fracture toughness of ductile iron has been studied using dynamic tear, fatigue precracked (FPC) Charpy, and compact tension (CT) specimens. Specimens were fractured both quasi-statically and dynamically. Initial crack extension was found to occur at maximum load for both the compact tension specimens and the FPC Charpy specimens. However, initial crack extension occurred prior to maximum load for the dynamic tear specimens. Upper-shelf KJIc values determined from the compact tension specimens and the FPC Charpy specimens were similar (83 and 76 MPa ?m) while the J-value at maximum load for the dynamic tear specimens was found to fit nicely on the J-R curve from the CT specimens. The shift in ductile-to-brittle transition temperature with strain rate (comparing quasi-static with impact loading) was similar to what has been observed for structural steel with a similar yield strength.
Dynamic Fracture Toughness of Ductile Iron
Author: P. McConnell
Publisher:
ISBN:
Category : Ductile iron
Languages : en
Pages : 14
Book Description
Dynamic J-integral fracture-toughness test results were obtained for several different ductile irons over a range of temperatures. The ductile irons were all of a chemistry and microstructure in nominal compliance with ASTM Specification for Ferritic Ductile Iron Suitable for Low Temperature Service (A 874).
Publisher:
ISBN:
Category : Ductile iron
Languages : en
Pages : 14
Book Description
Dynamic J-integral fracture-toughness test results were obtained for several different ductile irons over a range of temperatures. The ductile irons were all of a chemistry and microstructure in nominal compliance with ASTM Specification for Ferritic Ductile Iron Suitable for Low Temperature Service (A 874).
Metals Abstracts
Fracture Toughness of Unalloyed Austempered Ductile Cast Iron (ADI)
Author: SK. Putatunda
Publisher:
ISBN:
Category : Alloying elements
Languages : en
Pages : 8
Book Description
The influence of microstructure on the tensile properties and the plane strain fracture toughness (KIc) of unalloyed austempered ductile cast iron (ADI) was examined in room temperature ambient atmosphere. The crack growth mechanism during fracture toughness tests was determined through detailed fractographic studies. Compact tension and round cylindrical specimens were prepared from unalloyed ADI and were given four different austempering heat treatments to produce four different microstructures. Tensile properties and fracture toughness of these four differently heat-treated materials as well as cast materials were determined as per relevant ASTM standards.
Publisher:
ISBN:
Category : Alloying elements
Languages : en
Pages : 8
Book Description
The influence of microstructure on the tensile properties and the plane strain fracture toughness (KIc) of unalloyed austempered ductile cast iron (ADI) was examined in room temperature ambient atmosphere. The crack growth mechanism during fracture toughness tests was determined through detailed fractographic studies. Compact tension and round cylindrical specimens were prepared from unalloyed ADI and were given four different austempering heat treatments to produce four different microstructures. Tensile properties and fracture toughness of these four differently heat-treated materials as well as cast materials were determined as per relevant ASTM standards.
Fracture and Design Studies of Malleable and Ductile Irons
Author: Yi-Wen Cheng
Publisher:
ISBN:
Category : Ductile iron
Languages : en
Pages : 448
Book Description
Publisher:
ISBN:
Category : Ductile iron
Languages : en
Pages : 448
Book Description
Effect of Austenitizing Temperature and Time on the Fracture Toughness of Low Manganese Austempered Ductile Iron (ADI)
Author: Rachan Prabhakar Rao
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description