The Mechanical Properties of Cu/TiB2 Multilayer Structures

1990 ◽  
Vol 188 ◽  
Author(s):  
Kevin M. Hubbard ◽  
S. N. Basu ◽  
J-P. Hirvonen ◽  
T. R. Jervis ◽  
M. Nastasi
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Radiation Damage ◽  
Tribological Properties ◽  
Martensitic Steel ◽  
Multilayer Structures ◽  
Wear Properties ◽  
Substrate Hardness ◽  
Excellent Stability ◽  
Stability Against Radiation

ABSTRACTWe have investigated the hardness and tribological properties of Cu/TiB2 multilayer structures deposited on substrates of tempered martensitic steel. Films of Cu and TiB2 were also deposited as hardness standards. The wear properties of the films were found to be poor, because of lack of adhesion. However, the films do appear to have good fracture toughness. The hardness of the multilayer was 18% greater than that predicted by the law of mixtures applied to the reference standards and, when corrected for variations in substrate hardness, very nearly equal to that of the TiB2 film. Irradiation by 400 keY Ne-ions to doses of 1.0, 6.0, and 12×1015 ion/cm2 results in a slight hardening of the multilayer. The structure was found to have excellent stability against radiation damage.

FABRICATION AND TRIBOLOGICAL PROPERTIES OF GRADIENT FINE-GRAINED OXYGEN-BOOSTING LAYER ON ECAP-TREATED PURE TITANIUM SURFACE

2019 ◽  
Vol 26 (06) ◽  
pp. 1850199
Author(s):  
BAOSEN ZHANG ◽  
JIYING WANG ◽  
SHUAISHUAI ZHU ◽  
QIANGSHENG DONG ◽  
ZHANGZHONG WANG
Keyword(s):  
Mechanical Properties ◽  
Diffusion Process ◽  
Tribological Properties ◽  
Wear Mechanism ◽  
Titanium Surface ◽  
Pure Titanium ◽  
Coarse Grained ◽  
Wear Properties ◽  
Fine Grained ◽  
Equal Channel Angular Processing

The gradient fine-grained oxygen-boosting layer was prepared on equal channel angular processing (ECAP)-treated titanium with thermal oxidation and oxygen boost diffusion process, and tribological properties were systematically characterized. Results show that the as-prepared boosting layer consists of surface coarse-grained region, and inner fine-grained region. The corresponding thickness and mechanical properties further increase compared to those of virgin titanium. The oxygen-boosting layer reveals excellent anti-wear properties, the dominant wear mechanism of which is abrasive.

scholarly journals Investigation of Nano-Mechanical and- Tribological Properties of Hydrogenated Diamond Like Carbon (DLC) Coatings

2016 ◽  
Vol 33 (6) ◽  
pp. 769-776 ◽  
Author(s):  
Y.-R. Jeng ◽  
S. Islam ◽  
K-T. Wu ◽  
A. Erdemir ◽  
O. Eryilmaz
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Friction Coefficient ◽  
Young’S Modulus ◽  
Tribological Properties ◽  
Young's Modulus ◽  
Chemical Vapour ◽  
Diamond Like Carbon ◽  
Dlc Coatings ◽  
Mechanical And Tribological Properties

AbstractHydrogenated diamond like Carbon (H-DLC) is a promising lubricious coating that attracted a great deal of interest in recent years mainly because of its outstanding tribological properties. In this study, the nano-mechanical and -tribological properties of a range of H-DLC films were investigated. Specifically, four kinds of H-DLC coatings were produced on Si substrates in pure acetylene, pure methane, 25% methane + 75% hydrogen, 50% methane + 50% hydrogen discharge plasmas using a plasma enhanced chemical vapour deposition (PECVD) system. Nano indentation was performed to measure the mechanical properties such as hardness and young's modulus and nanoscartching was performed to investigate the frictional behavior and wear mechanism of the H-DLC samples in open air. Moreover, Vickers indentation method was utilized to assess the fracture toughness of the samples. The results revealed that there is a strong correlation between the mechanical properties (hardness, young's modulus, fracture toughness) and the friction coefficient of DLC coatings and the source gas chemistry. Lower hydrogen to carbon ratio in source gas leads to higher hardness, young's modulus, fracture toughness and lower friction coefficient. Furthermore, lower wear volume of the coated materials was observed when the friction coefficient was lower. It was also confirmed that lower hydrogen content of the DLC coating leads to higher wear resistance under nanoscratch conditions.

scholarly journals Influence of the substrate hardness and fracture toughness on the dynamic wear properties of coated tool steels

2019 ◽  
Vol 53 (4) ◽  
pp. 565-574 ◽  
Author(s):  
M. Sedlaček ◽  
B. Šetina Batič ◽  
D. Česnik ◽  
B. Podgornik
Keyword(s):  
Fracture Toughness ◽  
Tool Steels ◽  
Wear Properties ◽  
Coated Tool ◽  
Dynamic Wear ◽  
Substrate Hardness

Tribological Reaction Generated on Ceramic – Steel Couples Under Boundary Lubrication

1990 ◽  
Vol 112 (4) ◽  
pp. 637-642 ◽  
Author(s):  
Y. Tanita ◽  
T. Mine ◽  
K. Nakajima
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Friction And Wear ◽  
Ceramic Surface ◽  
Wear Properties ◽  
Lubricant Oil ◽  
Ceramic Surfaces ◽  
Fe Content ◽  
Friction And Wear Properties ◽  
Constituent Elements

The effect of ZnDTP on Al2O3, Si3C, and Si3N4 surface was investigated with ceramic-steel couples under lubricated conditions. Metal transfer to the ceramic surfaces was found to increase with load and surface roughness, depending on the kind of ceramic. P, S, and Zn as atomic constituent elements of ZnDTP were measured on the ceramic surface in all three types of ceramic-steel couple. The amount of each of these elements deposited increased as the Fe content transferred onto the surfaces increased. Measurements of hardness and fracture toughness were conducted on SiC and Si3N4 in SiC - and Si3N4-steel couples with and without additive to determine changes in mechanical properties of the ceramic surfaces. Further investigations were conducted to determine the effect of the gases, O2 and N2, on friction and wear properties of the Si3N4-steel couple. Saturation of the lubricant oil with O2 and N2 was found to cause an increase of the wear rate at about 100 N in this couple.

Microstructural and fractographic characterization of B4C-Al cermets tested under dynamic and static loading

1989 ◽  
Vol 47 ◽  
pp. 562-563
Author(s):  
Gyeung Ho Kim ◽  
Mehmet Sarikaya ◽  
D. L. Milius ◽  
I. A. Aksay
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Static Loading ◽  
Carbon Deposition ◽  
Full Density ◽  
Unique Combination ◽  
Strong Component ◽  
Reaction Products

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.

Characterization of interfaces in CVD-coated nicalon fiber-reinforced SiC

1989 ◽  
Vol 47 ◽  
pp. 556-557
Author(s):  
K.L. More ◽  
R.A. Lowden
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Frictional Stress ◽  
Fiber Reinforced ◽  
Pull Out ◽  
Carbon Coated ◽  
Fiber Matrix

The mechanical properties of fiber-reinforced composites are directly related to the nature of the fiber-matrix bond. Fracture toughness is improved when debonding, crack deflection, and fiber pull-out occur which in turn depend on a weak interfacial bond. The interfacial characteristics of fiber-reinforced ceramics can be altered by applying thin coatings to the fibers prior to composite fabrication. In a previous study, Lowden and co-workers coated Nicalon fibers (Nippon Carbon Company) with silicon and carbon prior to chemical vapor infiltration with SiC and determined the influence of interfacial frictional stress on fracture phenomena. They found that the silicon-coated Nicalon fiber-reinforced SiC had low flexure strengths and brittle fracture whereas the composites containing carbon coated fibers exhibited improved strength and fracture toughness. In this study, coatings of boron or BN were applied to Nicalon fibers via chemical vapor deposition (CVD) and the fibers were subsequently incorporated in a SiC matrix. The fiber-matrix interfaces were characterized using transmission and scanning electron microscopy (TEM and SEM). Mechanical properties were determined and compared to those obtained for uncoated Nicalon fiber-reinforced SiC.

CARLSON ALLOY C600 and C600 ESR

Alloy Digest ◽  
1994 ◽  
Vol 43 (11) ◽  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Fracture Toughness ◽  
Cold Working ◽  
Elevated Temperatures ◽  
High Strength ◽  
Heat Treating ◽  
Solid Solution Alloy ◽  
Resistance To Oxidation ◽  
Good Workability

Abstract CARLSON ALLOYS C600 AND C600 ESR have excellent mechanical properties from sub-zero to elevated temperatures with excellent resistance to oxidation at high temperatures. It is a solid-solution alloy that can be hardened only by cold working. High strength at temperature is combined with good workability. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: Ni-470. Producer or source: G.O. Carlson Inc.

SUPERSTON 40

Alloy Digest ◽  
1965 ◽  
Vol 14 (4) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Aluminum Bronze

Abstract SUPERSTON 40 is an aluminum bronze containing 12% manganese and has good casting properties and excellent mechanical properties. It is recommended for any application where extreme corrosion resistance is required and where weldability is desired, such as propellers and marine equipment. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness, creep, and fatigue. It also includes information on corrosion resistance as well as casting, forming, heat treating, and machining. Filing Code: Cu-150. Producer or source: H. Kramer & Company.

KAISER ALUMINUM ALLOY 7050

Alloy Digest ◽  
2000 ◽  
Vol 49 (1) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Heat Treating ◽  
High Fracture Toughness ◽  
High Fracture ◽  
Kaiser Aluminum ◽  
Structural Parts ◽  
Very High

Abstract Kaiser Aluminum Alloy 7050 has very high mechanical properties including tensile strength, high fracture toughness, and a high resistance to exfoliation and stress-corrosion cracking. The alloy is typically used in aircraft structural parts. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: AL-366. Producer or source: Tennalum, A Division of Kaiser Aluminum.

VIRGO 17.4 PH

Alloy Digest ◽  
2013 ◽  
Vol 62 (5) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Precipitation Hardening ◽  
Heat Treating

Abstract Virgo 17.4 PH is a 17Cr-4Ni-3Cu-0.3% Cb alloy that is precipitation hardening. It is martensitic and combines high mechanical properties with corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1145. Producer or source: Industeel USA, LLC.

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