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Evaluation of thermal processing and properties of 422 martensitic stainless steel for replacement of 4140 steel in diesel engine pistons

Journal Article · · Materials & Design

The thermal and mechanical properties of martensitic stainless steel 422 were evaluated for suitability as a drop-in replacement for 4140 steel in next generation heavy-duty diesel engine (HDDE) pistons. The time and temperature of the austenitization and tempering steps were studied to achieve optimum materials performance in piston applications, including the balance of thermal and mechanical properties and resistance to long-term thermal aging. Reducing the tempering temperature from 700 to 600 °C caused a substantial increase in elevated temperature strength from 25 to 600 °C, but had no significant influence on thermal conductivity, suggesting that thermal conductivity in 422 is dominated largely by composition and distribution of alloying elements and mostly independent of the sub-grain structure size and precipitate size. Compared to the current HDDE piston alloy 4140, 422 exhibits substantially higher elevated temperature strength and lower thermal conductivity, the latter which will cause 422 to operate at higher temperatures in pistons, possibly requiring a piston redesign to take advantage of the improved high temperature strength of 422. Piston material selection and alloy design strategies with potential to mitigate some of the shortcomings of martensitic stainless steels, such as 422, as drop-in replacements are discussed.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1844890
Journal Information:
Materials & Design, Journal Name: Materials & Design Journal Issue: 1 Vol. 214; ISSN 0264-1275
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (23)

Evaluation of the elastic modulus of steels journal March 2000
Influence of Alloying Elements, Heat Treatment, and Temperature on the Thermal Conductivity of Heat Treatable Steels journal December 2014
The influence of the M23 (C,N)6 compound on the mechanical properties of type 422 stainless steel journal July 1983
Effect of composition on thermal expansion of alloys used in power generation journal March 1987
The influence of heat treatment and resulting microstructures on the thermophysical properties of martensitic steels journal August 2013
Effect of water vapor on high-temperature oxidation of FeCr alloys journal July 2009
On the elastic properties and mechanical damping of Ti3SiC2, Ti3GeC2, Ti3Si0.5Al0.5C2 and Ti2AlC in the 300–1573K temperature range journal June 2006
Steam oxidation resistance of new 12%Cr steels: Comparison with some other ferritic steels journal April 2008
Molybdenum effect on oxidation resistance and electric conduction of ferritic stainless steel for SOFC interconnect journal July 2012
Mechanical properties of conventional structural steel and fire-resistant steel at elevated temperatures journal June 2021
The effect of single and double quenching and tempering heat treatments on the microstructure and mechanical properties of AISI 4140 steel journal December 2012
High temperature materials for heavy duty diesel engines: Historical and future trends journal June 2019
Thermal Diffusivity of Stainless Steel from 20° to 1000° C. journal July 1962
Effects of alloying elements and temperature on thermal conductivity of ferrite journal September 2019
Resonant ultrasound spectroscopy journal July 1997
A new method for determining the Curie temperature using a dilatometer journal September 2010
High Temperature Rupture, Fatigue, and Damping Properties of AISI Designation 616 (Type 422 Stainless) Steel journal June 1965
Effect of chromium content on creep rupture properties of a high chromium ferritic heat resisting steel. journal January 1989
Advances in Physical Metallurgy and Processing of Steels. Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel. journal January 2001
Effects of Alloying Additions on Thermal Conductivity of Ferritic Iron. journal January 2002
Isothermal Oxidation Behaviour of a Hot-Work Tool Steel journal August 2004
Evaluation of Microalloyed Steel for Articulated Piston Applications in Heavy Duty Diesel Engines conference March 2000
Effects of Sulfur Level and Anisotropy of Sulfide Inclusions on Tensile, Impact, and Fatigue Properties of SAE 4140 Steel journal April 2008

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