Molybdenum alloying in cast iron and steel

Chen, Xiangru; Zhai, Qijie; Han, Dong; Dai, Bao-Hua; Mohrbacher, Hardy

doi:10.1007/s40436-019-00282-1

Cited by 29 publications

(10 citation statements)

References 21 publications

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“…According to the literature, the maximum operating temperature is 950°C for the D5S grade. 22 The presence of Ni and Cr in the Ni-resist cast iron contributes to its resistance to oxidation and gives it greater dimensional stability in thermal fatigue. 23 In addition, Ni-resist is commonly specified for use in corrosive atmospheres and will exhibit corrosion resistant properties somewhere between cast iron and austenitic stainless steel.…”

Section: Methodsmentioning

confidence: 99%

Experimental and numerical investigation of thermal fatigue life in wedge specimens made of Ni-resist D5S cast iron

Ktari

Mellouli

Köster

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Thermal fatigue experiments were performed on a single-edge wedge specimen of Ni-resist D5S cast iron to reproduce the conditions to which exhaust manifolds are subjected during service. The leading edge temperature was cycled between 20°C and 850°C, and the temperature distribution on the specimen surface was measured with thermocouples during thermal cycling. Due to the complexity of the loads, a uncoupled thermomechanical computation of the problem was performed using the three-dimensional finite element code ABAQUS to evaluate the temperature, stress and strain distribution over a thermal fatigue specimen. The heat fluxes and forced convection coefficients generated by the thermal fatigue benchmark were optimized in both heating and cooling phases by reverse engineering to reproduce the experimental temperature-time profiles measured by thermocouples on the surface of the specimen. Then, an elastic-viscoplastic tow-layer model was used to simulate the mechanical behavior of the studied material. It was found that the maximum stress value was located in the center of the specimen at the edge of the wedge. This result was confirmed by experimental observations. The crack initiation zone is located in the edge zone and the direction of crack propagation is perpendicular to the edge line toward the thick part of the specimen. The saturation of the main crack propagation near the uniform specimen zone was mainly explained by the rapid decrease of the energy dissipated per cycle.

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Section: Methodsmentioning

confidence: 99%

Experimental and numerical investigation of thermal fatigue life in wedge specimens made of Ni-resist D5S cast iron

Ktari

Mellouli

Köster

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…uctile iron is a cast iron with spheroidal graphite, so-called spheroidal graphite cast iron. It has mechanical properties that are similar to those of some steels [1]. More favourably, in contrast to cast steels, ductile iron has many technical and manufacturing advantages.…”

Section: Introductionmentioning

confidence: 95%

Study of the Influence of Alloying Elements on the Mechanical Characteristics and Wear Behavior of a Ductile Cast Iron

Boulifa

Hadji

2021

Frattura Ed Integrità Strutturale

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In the present work, the influence of alloying elements, on the mechanical characteristics and wear behavior by modification of the chemical composition of the ductile iron was studied, in order to improve these characteristics for the manufacture of agricultural tractors parts in particular front and rear axles, ploughshares, gear crankcase, pinions, transmission shafts, crankshafts, etc... The cast iron investigated was prepared in an induction furnace at 1500°C and inoculated with a ferro-silicon-magnesium to 45% Si and 10% Mg. The specimens were casted into self-hardening sand moulds at 1450°C, after an addition of alloying elements, Manganese (0.6%), Nickel (0.5%), Molybdenum (0.2%) and Vanadium(0.1%)) in the base spheroidal graphite cast iron produced. Various techniques, Optical microscopy, Microhardness, Hardness, Tensile strength, Impact resistance, and Wear tests (Wear resistance and Friction coefficient) were used to characterize these specimens. The obtained results show that the tested samples have ductile iron structures formed by ferrite and pearlite. Moreover, mechanical and wear tests prove that the alloyed cast iron has improved characteristics compared to unalloyed cast iron and shows the positive effect of alloying elements on these characteristics.

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“…Chromium alloying is usually done in order to increase corrosion and oxidation resistance, as well as to improve hardenability [16]. Molybdenum alloying up to 0,2% further increases the hardenability of low-alloy steels [17]. Another advantage of Cr-Mo low-alloy steels are good creep characteristics [16].…”

Section: Low-alloy Steelsmentioning

confidence: 99%

Quantitative Methods for Steering Knuckle Material Selection

Živković¹,

Adamović²,

Nedić³

2021

MVM

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The paper gives a description of the material selection process for a steering knuckle of a passenger vehicle's independent suspension system, by using two quantitative methods of material selection: Weighted Property Method and Limits on Property Method. After the definition of property requirements that potential materials must meet, digital-logic method has been applied in order to calculate the weighting factors of said properties. The material selection process included the application of Cambridge Engineering Selector for the analysis of diagrams and property values of potential materials. The obtained results indicate that the Weighted Property Method leads to the conclusion that the optimal steering knuckle material is low alloy steel 25CrMo4, while the Limits on Property Method shows that aluminum alloy AlZn5.5MgCu T6 is the optimal material.

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Molybdenum alloying in cast iron and steel

Cited by 29 publications

References 21 publications

Experimental and numerical investigation of thermal fatigue life in wedge specimens made of Ni-resist D5S cast iron

Experimental and numerical investigation of thermal fatigue life in wedge specimens made of Ni-resist D5S cast iron

Study of the Influence of Alloying Elements on the Mechanical Characteristics and Wear Behavior of a Ductile Cast Iron

Quantitative Methods for Steering Knuckle Material Selection

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