Materials for a New Generation of Vehicles

1995 ◽  
Vol 393 ◽  
Author(s):  
Toni Grobstein
Keyword(s):  
Fuel Efficiency ◽  
High Strength ◽  
Cost Effective ◽  
Advanced Materials ◽  
Ongoing Research ◽  
Structural Applications ◽  
Materials Research ◽  
National Initiative ◽  
Engine Components ◽  
New Generation

ABSTRACTThe Partnership for a New Generation of Vehicles (PNGV) is a national initiative with three goals: First, to significantly improve national competitiveness in manufacturing; second, to implement commercially viable innovations from ongoing research on conventional vehicles, and third, to develop a vehicle to achieve up to three times the fuel efficiency of today's comparable vehicle (ie, the 1994 Chrysler Concorde, Ford Taurus, and Chevrolet Lumina). Note this vehicle will have the equivalent customer purchase price of today's vehicles adjusted for economics, while meeting the customers' needs for quality, performance, and utility. Eight federal agencies are currently contributing to these goals, as well as the three principal US automobile manufacturers, numerous automotive component suppliers, research laboratories, and universities.Materials research and development is a significant effort within PNGV. The goals in this area include development of lightweight, recyclable materials for structural applications, high strength, long-life, high temperature materials for engine components, improved materials for alternative propulsion and energy storage systems, and cost-effective process technologies and component fabrication methods. Application of advanced materials to automobiles will involve consideration of diverse factors, including weight savings, affordability, recyclability, crashworthiness, repairability, and manufacturability.

FERRIUM M54

Alloy Digest ◽  
2018 ◽  
Vol 67 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Resistance ◽  
High Strength ◽  
Cost Effective ◽  
High Fracture Toughness ◽  
High Fracture ◽  
Structural Applications ◽  
Resistance To Stress

Abstract Ferrium M54 was designed to create a cost-effective, ultra high-strength, high-fracture toughness material with a high resistance to stress-corrosion cracking for use in structural applications. This datasheet provides information on composition, hardness, and tensile properties as well asfatigue. Filing Code: SA-822. Producer or source: QuesTek Innovations, LLC.

scholarly journals Microstructure And Mechanical Properites Of Welded Advanced Materials For Automotive Applications

2021 ◽  
Author(s):  
Wen Xu
Keyword(s):  
Fiber Laser ◽  
Adhesive Layer ◽  
High Strength ◽  
Advanced Materials ◽  
Automotive Manufacturing ◽  
Bonding Length ◽  
Higher Temperature ◽  
Lower Temperature ◽  
New Generation ◽  
Steel Joints

Growing use of advanced materials (advanced high strength steel DP980 and ultralight-weight magnesium alloys) and innovative joining techniques (new-generation laser welding technology and weld bonding technique) is crucial for better fuel economy and lower CO2 emissions in automotive manufacturing. Microstructures and mechanical properties of fiber laser welded high strength low alloy and DP980 steel joints, weld-bonded Mg/Mg and Mg/steel joints and adhesive-bonded Mg/Mg joints were studied. Tempered martensite and welding concavity were observed in fiber laser welded DP980 joints which reduced fatigue resistance, while both HSLA and DP980 joints showed a superior tensile strength. Weld-bonded Mg/Mg and Mg/steel joints with an adhesive layer were significantly stronger than resistance spot welded Mg/steel joints. Reducing bonding length on weld bonded Mg/Mg joints led to a higher maximum tensile shear stress, both tensile and fatigue strength were slight lower than that of adhesive bonded Mg/Mg joints, while ability of energy absorption was equivalent. The tensile properties reduced at a higher temperature (90°C) but it increased at a lower temperature (-40°C).

scholarly journals Alloys for Aeronautic Applications: State of the Art and Perspectives

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 662 ◽  
Author(s):  
Antonio Gloria ◽  
Roberto Montanari ◽  
Maria Richetta ◽  
Alessandra Varone
Keyword(s):  
State Of The Art ◽  
Load Capacity ◽  
Fuel Efficiency ◽  
Great Effort ◽  
Matrix Composites ◽  
Metallic Materials ◽  
Flight Range ◽  
Ti Alloys ◽  
Engine Components ◽  
New Generation

In recent years, a great effort has been devoted to developing a new generation of materials for aeronautic applications. The driving force behind this effort is the reduction of costs, by extending the service life of aircraft parts (structural and engine components) and increasing fuel efficiency, load capacity and flight range. The present paper examines the most important classes of metallic materials including Al alloys, Ti alloys, Mg alloys, steels, Ni superalloys and metal matrix composites (MMC), with the scope to provide an overview of recent advancements and to highlight current problems and perspectives related to metals for aeronautics.

scholarly journals Making ultrastrong steel tough by grain-boundary delamination

Science ◽  
2020 ◽  
Vol 368 (6497) ◽  
pp. 1347-1352 ◽  
Author(s):  
L. Liu ◽  
Qin Yu ◽  
Z. Wang ◽  
Jon Ell ◽  
M. X. Huang ◽  
...  
Keyword(s):  
Fracture Resistance ◽  
High Strength ◽  
Cost Effective ◽  
Transformation Induced Plasticity ◽  
Ultrahigh Strength ◽  
Austenite Grain ◽  
Structural Applications ◽  
Ultrahigh Strength Steels ◽  
Fracture Processes ◽  
Primary Fracture

Developing ultrahigh-strength steels that are ductile, fracture resistant, and cost effective would be attractive for a variety of structural applications. We show that improved fracture resistance in a steel with an ultrahigh yield strength of nearly 2 gigapascals can be achieved by activating delamination toughening coupled with transformation-induced plasticity. Delamination toughening associated with intensive but controlled cracking at manganese-enriched prior-austenite grain boundaries normal to the primary fracture surface dramatically improves the overall fracture resistance. As a result, fracture under plane-strain conditions is automatically transformed into a series of fracture processes in “parallel” plane-stress conditions through the thickness. The present “high-strength induced multidelamination” strategy offers a different pathway to develop engineering materials with ultrahigh strength and superior toughness at economical materials cost.

scholarly journals Microstructure And Mechanical Properites Of Welded Advanced Materials For Automotive Applications

2021 ◽  
Author(s):  
Wen Xu
Keyword(s):  
Fiber Laser ◽  
Adhesive Layer ◽  
High Strength ◽  
Advanced Materials ◽  
Automotive Manufacturing ◽  
Bonding Length ◽  
Higher Temperature ◽  
Lower Temperature ◽  
New Generation ◽  
Steel Joints

Growing use of advanced materials (advanced high strength steel DP980 and ultralight-weight magnesium alloys) and innovative joining techniques (new-generation laser welding technology and weld bonding technique) is crucial for better fuel economy and lower CO2 emissions in automotive manufacturing. Microstructures and mechanical properties of fiber laser welded high strength low alloy and DP980 steel joints, weld-bonded Mg/Mg and Mg/steel joints and adhesive-bonded Mg/Mg joints were studied. Tempered martensite and welding concavity were observed in fiber laser welded DP980 joints which reduced fatigue resistance, while both HSLA and DP980 joints showed a superior tensile strength. Weld-bonded Mg/Mg and Mg/steel joints with an adhesive layer were significantly stronger than resistance spot welded Mg/steel joints. Reducing bonding length on weld bonded Mg/Mg joints led to a higher maximum tensile shear stress, both tensile and fatigue strength were slight lower than that of adhesive bonded Mg/Mg joints, while ability of energy absorption was equivalent. The tensile properties reduced at a higher temperature (90°C) but it increased at a lower temperature (-40°C).

A Cost Effective Process for Silicon Nitride Engine Components

1994 ◽  
Author(s):  
Garry J. Garvey ◽  
Jack D. Sibold
Keyword(s):  
Silicon Nitride ◽  
High Reliability ◽  
Low Cost ◽  
High Strength ◽  
Cost Effective ◽  
Shock Resistance ◽  
Baseline Cost ◽  
Engine Components ◽  
Low Cost Manufacturing ◽  
High Thermal Shock Resistance

Silicon Nitride (Si3N4) ceramics offer tremendous material advantages for automotive and other high strength, high thermal shock resistance applications. Yet while the need for such a material continues to rise, the high cost of silicon nitride components remains a significant barrier to market acceptance. It was determined that market acceptance hinged on achieving three goals: high flexural strength (i.e. 4 pt. MOR >525 MPa), high reliability (i.e. Weibull modulus >15) and a spray-dried body cost of <$13.00/kg. To address this need, GTC/Coors licensed a prototype process from Eaton for making Sintered Reaction-Bonded Silicon Nitride (SRBSN) that offered the potential for low cost manufacturing. This paper describes the process optimization that took place to adapt this prototype process to GTC/Coors existing manufacturing technology base. It also presents the material properties and baseline cost-efficiency goals that were achieved.

scholarly journals Regulating Mechanical Properties of Al/SiC by Utilizing Different Ball Milling Speeds

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 332
Author(s):  
Saud M. Almotairy ◽  
Nabeel H. Alharthi ◽  
Hany S. Abdo
Keyword(s):  
Mechanical Properties ◽  
Ball Milling ◽  
High Strength ◽  
Vital Role ◽  
Advanced Materials ◽  
Metal Matrix Nanocomposite ◽  
Structural Applications ◽  
Flake Powder Metallurgy ◽  
New Strategies ◽  
Matrix Nanocomposite

Advanced materials with high strength are in great demand for structural applications, such as in aerospace. It has been proved that fabrication strategy plays a vital role in producing composites to satisfy these needs. This study explores new strategies for flake powder metallurgy, with the aim of designing an effective strategy to achieve the highest possible mechanical strength for a metal matrix nanocomposite without changing the reinforcement fraction. Different strategies were used to regulate the mechanical properties for similar composites based on shift speed ball milling. Ultra-ductile composites on one hand, and ultra-strong composites on the other hand, were fabricated using similar composites. The results demonstrate that shifting the ball milling speed can be used to manipulate the mechanical properties of the composite to achieve the desired properties for any specific application.

In situ observation of the martensitic transformation in (Mg,Y)-PSZ

1986 ◽  
Vol 44 ◽  
pp. 500-501
Author(s):  
R-R. Lee
Keyword(s):  
Martensitic Transformation ◽  
High Strength ◽  
Nucleation And Growth ◽  
In Situ Observation ◽  
Considerable Potential ◽  
Transmission Electron ◽  
Structural Applications ◽  
Applied Stresses ◽  
Kinetics Of

Partially-stabilized ZrO2 (PSZ) ceramics have considerable potential for advanced structural applications because of their high strength and toughness. These properties derive from small tetragonal ZrO2 (t-ZrO2) precipitates in a cubic (c) ZrO2 matrix, which transform martensitically to monoclinic (m) symmetry under applied stresses. The kinetics of the martensitic transformation is believed to be nucleation controlled and the nucleation is always stress induced. In situ observation of the martensitic transformation using transmission electron microscopy provides considerable information about the nucleation and growth aspects of the transformation.

Sign in / Sign up

Export Citation Format

Share Document