Investigation of thermochemical boriding effect on wear behavior of a GGG 50 quality as-cast ductile iron

2016 ◽  
Vol 68 (4) ◽  
pp. 476-481 ◽  
Author(s):  
Harun Mindivan
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Ductile Iron ◽  
Room Temperature ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Wear Test ◽  
Content Type ◽  
Pin On Disc ◽  
Cast Ductile Iron

Purpose This study aims to investigate the microstructure and the abrasive wear features of the untreated and pack borided GGG 50 quality ductile iron under various working temperatures. Design/methodology/approach GGG 50 quality as-cast ductile iron samples were pack borided in Ekabor II powder at 900°C for 3 h, followed by furnace cooling. Structural characterization was made by optical microscopy. Mechanical characterization was made by hardness and pin-on-disc wear test. Pin-on-disc test was conducted on a 240-mesh Al2O3 abrasive paper at various temperatures in between 25 and 450°C. Findings Room temperature abrasive wear resistance of the borided ductile iron increased with an increase in its surface hardness. High-temperature abrasive wear resistances of the borided ductile iron linearly decreased with an increase in test temperature. However, the untreated ductile iron exhibited relatively high resistance to abrasion at a temperature of 150°C. Originality/value This study can be a practical reference and offers insight into the effects of boriding process on the increase of room temperature wear resistance. However, above 150°C, the untreated ductile iron exhibited similar abrasive wear performance as compared to the borided ductile iron.

Abrasive Wear Behavior of Permanent Moulded Toughened Austempered Ductile Iron

2009 ◽  
Author(s):  
T. R. Uma ◽  
J. B. Simha ◽  
K. Narasimha Murthy
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Ductile Iron ◽  
Wear Behavior ◽  
Structural Features ◽  
Abrasive Wear Resistance ◽  
Austempered Ductile Iron ◽  
Graphite Morphology ◽  
Abrasive Wear Behavior ◽  
Austempering Temperature

Laboratory abrasive wear tests have been reported on permanent moulded toughened austempered ductile iron. The influence of austempering temperature on the abrasive wear behavior have been studied and discussed. The results indicate that with increase in austempering temperature from 300°C to 350°C, the abrasive wear resistance increased, and as the austempering temperature increased to 400°C, there was reduction in the abrasive wear resistance. These results have been interpreted based on the structural features and graphite morphology.

scholarly journals Investigation of Mechanical Properties of AISI 316 Stainless Steel by Carbonitriding Process

2020 ◽  
Vol 184 ◽  
pp. 01018
Author(s):  
A Rohit Sai Krishna ◽  
B Vamshi Krishna ◽  
D Harshith ◽  
T Sashank ◽  
Ram Subbiah
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Wear Behavior ◽  
Wear Test ◽  
Salt Bath ◽  
Wear Loss ◽  
Case Hardening ◽  
Wide Range ◽  
Pin On Disc ◽  
Aisi 316 Stainless Steel

This project investigates on salt bath nitriding process in order to improve the wear behavior of the material. This process increases the hardness of the material. The specimens were nitrided at 580°c on three different timing hours such as 60 minutes, 90 minutes & 120 minutes. A pin on disc machine is used to conduct wear test, so that wear loss can be determined. The specimens are to be magnified by metallographic test like scanning electron microscope. The untreated specimen is used to compare with the nitrided specimen. The best specimen is chosen which determines the life of material & improves the better wear resistance. The hardness of untreated material and nitrided material are compared. The material AISI stainless steel has many unique properties but it lacks wear resistance and hardness because of which it has limited applications. By conducting heat treatment operation, the hardness of the material does not improve, but by conducting case hardening process the hardness of the outer case will be high compared to base metal. If the hardness and wear resistance of the material improves the material can be used in wide range of applications.

Investigation on microstructures, mechanical and wear properties of Al 390/ZrO2 composite materials fabricated by P/M method

2020 ◽  
Vol 17 (1) ◽  
pp. 149-166
Author(s):  
Karthikeyan S ◽  
Karunanithi R ◽  
Ashoke Ghosh
Keyword(s):  
Wear Resistance ◽  
Wear Test ◽  
Matrix Alloy ◽  
Sem Analysis ◽  
High Wear Resistance ◽  
Wear Properties ◽  
Content Type ◽  
The Matrix ◽  
Pin On Disc ◽  
A390 Alloy

PurposeAluminium is the most proficiently and commonly used metal due to its desirable physical, chemical and mechanical properties. When Aluminium reinforced with hard ceramic particles, shows increased strength and good corrosion resistant and wear resistant qualities. In the present investigation, A390 + X vol. % Zro2 (X = 5, 10 and 15) composites have been fabricated through P/M technique.Design/methodology/approachAfter that the microstructural properties are tested by scanning electron microscope (SEM) analysis wear test is performed using pin-on-disc machine.FindingsThe wear conditions of applied load 30N and sliding velocity 1 m/s and track distance 1000m was followed. A390 + 15% Zro2 of surface of the composites unveiled greater hardness when compared with A390 alloy.Originality/valueA390 + 15% Zro2 exhibited superior wear resistance than that of the matrix alloy. Thus the material proves as an excellent solution for applications that requires high wear resistance.

Wear Mitigation in Magnesium Alloy AZ80 Processed by Equal Channel Angular Pressing

2011 ◽  
Vol 6 ◽  
pp. 1-11 ◽  
Author(s):  
Yasser Fouad ◽  
Khaled M. Ibrahim ◽  
Brando Okolo
Keyword(s):  
Wear Resistance ◽  
Magnesium Alloy ◽  
Equal Channel Angular Pressing ◽  
Wear Behavior ◽  
Wear Test ◽  
Aging Treatment ◽  
Angular Pressing ◽  
Pin On Disc ◽  
Set Up ◽  
Az80 Alloy

First results of the influence of Equal Channel Angular Pressing (ECAP) on the wear behavior of the magnesium alloy AZ80 have been discussed. The evident grain refinement and redistribution of second phases in the 4 pass processed materials resulted in an increase of the hardness state in the AZ80 alloy. Wear tests conducted on a pin-on-disc set-up revealed better wear resistance for the 4 pass processed materials. Isothermal aging treatment, at 210°C for 10 hrs, of the ECAP processed materials showed that wear resistance properties are improved markedly. For incremental sliding speeds during the wear test, wear rate of the AZ80 alloy was found to increase.

Optimizing wear resistance of ceramic (TiN, WC and TiC) clad layer by gas tungsten arc welding (GTAW)

2014 ◽  
Vol 66 (3) ◽  
pp. 452-458 ◽  
Author(s):  
De-Xing Peng
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Arc Welding ◽  
Wear Test ◽  
Gas Tungsten Arc Welding ◽  
Content Type ◽  
Gas Tungsten Arc ◽  
Clad Layer ◽  
Pin On Disc ◽  
Gas Tungsten

Purpose – This paper aims to compare the wear performance of carbon steel specimens clad with TiC, WC and TiN powders by the gas tungsten arc welding (GTAW) method under optimum processing conditions. Design/methodology/approach – Various ceramic powders (TiC, WC and TiN) with equal percentages by weight were prepared for use as cladding materials to compare their effects on wear resistance. The wear behaviors of different cladding specimens were evaluated with a rotating-type tribometer under dry sliding conditions. The cladding microstructures were characterized by optical microscopy, scanning electron microscopy and X-ray energy dispersive spectrometry. Findings – The experimental results confirmed that the hardness was also much higher in the carbon steel with cladding than in carbon steel without cladding. The pin-on-disc wear test showed that the wear-resistance of ceramics clad with TiC is better than that in ceramics clad with WC or TiN. The wear scar area of the specimen with TiC cladding was only one-tenth that of carbon steel without cladding. Originality/value – The experiments confirm that the cladding surfaces of ceramic particles reduce wear rate and friction.

High temperature abrasive wear behavior of an as-cast ductile iron

Wear ◽  
2005 ◽  
Vol 258 (1-4) ◽  
pp. 189-193 ◽  
Author(s):  
Ozgur Celik ◽  
Hayrettin Ahlatci ◽  
E. Sabri Kayali ◽  
Huseyin Cimenoglu
Keyword(s):  
High Temperature ◽  
Abrasive Wear ◽  
Ductile Iron ◽  
Wear Behavior ◽  
Abrasive Wear Behavior ◽  
Cast Ductile Iron

scholarly journals Effect of VN and TiB2-TiCx Reinforcement on Wear Behavior of Al 7075-Based Composites

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3389
Author(s):  
Yaping Bai ◽  
Jiale Wei ◽  
Naqing Lei ◽  
Jianping Li ◽  
Yongchun Guo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Room Temperature ◽  
Wear Behavior ◽  
Wear Test ◽  
Wear Properties ◽  
Al 7075 ◽  
Hot Pressing Sintering ◽  
Oxidation Wear

Al 7075 alloy, 15 wt.% VN/7075 composites, and 20 wt.% TiB2-TiCx/7075 composites were prepared by ball milling with subsequent hot-pressing sintering. The microstructure, hardness, and wear properties at room temperature to 200 °C of Al 7075-based composites with different reinforcement phases were discussed. The grain uniformity degree values of 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites were 0.25 and 0.13, respectively. The reinforcement phase was uniformly distributed in 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites, almost no agglomeration occurred. The order of hardness was 20 wt.% TiB2-TiCx/7075 composites (270.2 HV) > 15 wt.% VN/7075 composites (119.5 HV) > Al 7075 (81.8 HV). At the same temperature, the friction coefficient of 15 wt.% VN/7075 composites was the lowest, while the volume wear rate of 20 wt.% TiB2-TiCx/7075 composites was the lowest. With the increase of temperature, the wear mechanism of Al 7075 changed from spalling wear to oxidation wear and adhesion wear. However, the wear mechanisms of 15 wt.% VN/7075 and 20 wt.% TiB2-TiCx/7075 composites changed from abrasive wear at room temperature to wear mechanism (oxidation wear, abrasive wear, and adhesive wear) at medium and low temperature. Comprehensive wear test results indicated that 20 wt.% TiB2-TiCx/7075 composites had excellent tribological properties at medium and low temperature.

scholarly journals Effect of microstructure on the abrasive wear resistance of steels with hardness 450 HV

2019 ◽  
Vol 36 (1−2) ◽  
Author(s):  
Oskari Haiko ◽  
Vuokko Heino ◽  
David A Porter ◽  
Juha Uusitalo ◽  
Jukka Kömi
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Abrasive Wear Resistance ◽  
Scratch Testing ◽  
Tempered Martensite ◽  
Cooling Rates ◽  
Abrasive Wear Behavior ◽  
Main Factor

Hardness has been considered the main factor controlling the abrasive wear of steels. However, microstructure also affects the wear behavior. Four steels with different microstructures were produced with a Gleeble 3800 thermomechanical simulator and tested for abrasive wear behavior. Different cooling rates and heat treatments were applied to obtain a surface hardness of approximately 450 HV. Mainly tempered martensite, pearlite and some bainite could be observed in the microstructures. Scratch testing with a CETR UMT-2 tribometer was conducted to produce wear tracks. The results revealed that each steel showed distinct wear behavior.

scholarly journals Effect of interaction between cementite and pearlite on two-body abrasive wear behaviors in white cast iron

Friction ◽  
2020 ◽  
Author(s):  
Baochao Zheng ◽  
Wei Li ◽  
Xiaohui Tu ◽  
Jiandong Xing ◽  
Suocheng Song
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Abrasive Wear ◽  
White Cast Iron ◽  
Wear Behavior ◽  
Interaction Mechanism ◽  
Wear Test ◽  
Wear Process ◽  
Cr Content ◽  
Contact Loads

AbstractThe wear interaction of cementite and pearlite in the white cast iron (WCI) was investigated using the two-body abrasive wear test under contact loads of 20, 35, and 50 N. The wear behavior, wear surface morphology, sub-surface structure, and wear resistance were evaluated using X-ray diffraction, microhardness testing, and nano-indentation. The results indicated that when the Cr content was increased from 0 to 4 wt%, there was a significant increase in the microhardness (H) and elasticity modulus (E) of the cementite. This yielded a 15.91%- and 23.6%-reduction in the degree of wear resistance and surface roughness, respectively. Moreover, no spalling and breaking of cementite was observed with increasing Cr content during the wear process, indicating improved wear resistance of the bulk cementite. In addition, the hard phase (cementite) and tough matrix (pearlite) composite structure exhibited a good protective and supporting effect. Thus, it was concluded that the interaction mechanism of the wear phase contributed to the reduction of the wear weight loss of the composite during the wear process. The contribution of the interaction between the hard wear-resistant phase and the tough phase in WCI to the wear resistance decreased with increasing hardness of the pearlite matrix.

Effect of the simultaneous Ti and W addition on the microstructure and wear behavior of a high chromium white cast iron

2019 ◽  
Vol 116 (6) ◽  
pp. 602 ◽  
Author(s):  
Francisco Vapeani Guerra ◽  
Arnoldo Bedolla-Jacuinde ◽  
Jorge Zuno-Silva ◽  
Ignacio Mejia ◽  
Edgar Cardoso-Legorreta ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Abrasive Wear Resistance ◽  
Carbide Formation ◽  
The Matrix ◽  
Bulk Hardness ◽  
Primary Carbides

The present work analyzes the effect of 0.7%Ti and 1.7%W addition to a 17% chromium white iron in as-cast condition and after destabilization heat treatment. These alloys are commonly used in applications where a high abrasive wear resistance is required. For this reason, in addition to the characterization, a complementary wear test was performed. The alloys were characterized by optical and electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. The simultaneous Ti and W addition promoted the (Ti,W)C primary carbides formation which grow in the early stages of solidification. These carbides were found well distributed in the iron matrix with an average hardness value of 2450 HV. Moreover, tungsten was found partially distributed in the different phases increasing the microhardness by solid solution and refining the eutectic carbide. These microstructural modifications resulted in the increase of the bulk hardness and abrasive wear resistance of the alloyed iron. After destabilization heat treatment, the carbide precipitation and the matrix transformation produced a secondary hardening reducing the wear losses. Based in the results of the present study, the simultaneous addition of these elements to promote the (Ti,W)C carbide formation during solidification represents an effective method to increase the hardness and wear resistance of these kind of alloys via small additions.

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