High temperature fatigue and oxidation characteristics of forged steel piston materials

Niu, Dexue; Zhang, Jian; Peiyou, Xiong; Hao, Guannan; Liu, Shiying; Guo, Wei

doi:10.1016/j.engfailanal.2019.01.014

Cited by 16 publications

(12 citation statements)

References 10 publications

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“…The micro-alloy steel 38MnVS6 (38MnSiVS5, before called 38MnVS5) [5,6] is medium-carbon-manganese steel 38MnVS6 [8,10], which is one of main of unhardened steels [7] about destiny for controlled cooling from forging temperature. One of the benefits using micro-alloy steel 38MnVS6 is the content of micro alloys, for example V (Table 1), which allows on the growth of steel strength without necessarily hardened and tempered, which in turn off allows reducing the production costs [7,14]. The steel 38MnVS6 because i.a.…”

Section: Subject Of Study and Materialsmentioning

confidence: 99%

“…The steel 38MnVS6 because i.a. has high yield strength and good wear resistance [1,9] has applies to the production of hot forged products from the automotive industry [9,12,14] for example car forgings [10] which are the subject of this work. The subject of the study were three forgings with a ball shape and weight 28 N, forged from temperature 1250 °C from 38MnVS6 steel, which choice resulted from the need of achieving their required mechanical properties (Figure 1).…”

Section: Subject Of Study and Materialsmentioning

confidence: 99%

“…Using the micro-alloy steel, although that steel needs the mechanical machining constituting approx. 50 % -60 % of all production costs [4], is allowed to reduce the energy and production costs [7,11,14], for example compared to heat-treated steel or hardened steel by 30 % and 20 % respectively [1]. Also, in the context of reduction of cost by production among others forgings made of micro-alloy steel, it is important the fact that when are produced under the right conditions, they do not require normalization.…”

Section: Introductionmentioning

confidence: 99%

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improving the process of achieving required microstructure and mechanical properties of 38mnvs6 steel

Siwiec

Dwornicka

Pacana

2020

METAL 2020 Conference Proeedings

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The micro-alloyed steel 38MnVS6 (38MnSiVS5 or 38MnVS5) applied mostly in the automotive industry (for example production of forgings), has a high yield point and relatively good wear resistance. Aim of the study was preliminary to analyse the influence of twice the normalization process of micro-alloyed steel 38MnVS6 on its microstructure and mechanical properties. The normalization process was made in two steps in a pusher furnace PP-300 at temperatures 910 °C (cooling under the fan 5200 rpm) and 880 °C (cooling in open air). The total normalization time was 16200 seconds each time. Yield strength, tensile strength and hardness were analysed. Analysis was occurred based on results of the normalization process of three forgings for use in the automotive industry, ball-shaped and weight 28 N, forged from a temperature of 1250 ° C from micro-alloyed steel 38MnVS6. It has been shown that carrying out two processes for normalizing micro-alloy steel 38MnVS6 allows achieving its homogeneous and fine-grained microstructure and obtaining better mechanical properties and thus filled the gap regarding the lack of analysis of the impact of the normalization process on 38MnVS6 steel.

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Section: Subject Of Study and Materialsmentioning

confidence: 99%

Section: Subject Of Study and Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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improving the process of achieving required microstructure and mechanical properties of 38mnvs6 steel

Siwiec

Dwornicka

Pacana

2020

METAL 2020 Conference Proeedings

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“…The piston is the core component in a diesel engine that is subjected to severe thermal and mechanical loads. [1][2][3][4] Therefore, thermomechanical fatigue (TMF) is the main failure mode for diesel engine pistons.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, as the requirement for higher power density, lower emission and less fuel consuming diesel engines is sharply increasing, the design of diesel engine components has become more complex. The piston is the core component in a diesel engine that is subjected to severe thermal and mechanical loads 1–4 . Therefore, thermo‐mechanical fatigue (TMF) is the main failure mode for diesel engine pistons.…”

Section: Introductionmentioning

confidence: 99%

Experimental and computational study on thermo‐mechanical fatigue life of aluminium alloy piston

Chen

et al. 2020

Fatigue Fract Eng Mat Struct

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To assess the life of a new diesel aluminium alloy piston under thermal shock loads, thermo-mechanical fatigue (TMF) testing was conducted to characterise the TMF properties of the piston alloy, and an empirical model based on the constraint ratio concept was proposed to predict the TMF life of the piston. Considering that the empirical model required expensive experimental support, a platform with high-frequency induction heating was established to simulate the force on the piston under thermal shock loads to calculate the piston life using the thermal shock test. Additionally, a finite element method was developed to compute the distributions of temperature, strain, and stress during this process. The characteristics of crack initiation and propagation in TMF test rods and piston mock-ups were also investigated. The results showed that the TMF test rod suffered brittle fracture with brittle quasi-cleavage features. The microcracks mainly occurred in primary Si particles due to stress concentration around the primary Si particles induced by the difference between the thermal expansion coefficients of Si and Al. From a macro perspective, the piston initially cracked at the rim above the pinhole, where the stress is larger than that along other directions. From a micro perspective, the protrusions of various sizes on the piston rim were induced by the compression stresses at high temperature. The piston cracks usually initiate around primary Si particles, propagate along the edge of primary Si in a straight line, bifurcate and then stop at a certain depth. If the piston was only heated, cracks or plastic deformations were not produced. The piston life can be assessed using the proposed empirical model based on the constraint ratio concept or thermal shock testing based on the developed platform. The difference between the predicted and experimental life was not greater than 7%.

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Design, Thermo-Mechanical Analysis and Optimization of an IC Engine Piston with Aluminium and AlSi4032

Patel¹,

Atulkar²

2023

Lecture Notes in Mechanical Engineering

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High temperature fatigue and oxidation characteristics of forged steel piston materials

Cited by 16 publications

References 10 publications

improving the process of achieving required microstructure and mechanical properties of 38mnvs6 steel

improving the process of achieving required microstructure and mechanical properties of 38mnvs6 steel

Experimental and computational study on thermo‐mechanical fatigue life of aluminium alloy piston

Design, Thermo-Mechanical Analysis and Optimization of an IC Engine Piston with Aluminium and AlSi4032

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