MARC details
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04812ntm a2200373 i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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MY-KuUP |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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20251125110109.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS |
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a||||fr|||| 000 0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION |
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ta |
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220906t20222022my a|||fr|||| 000 0 eng d |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
THE0009406 (Local) |
| Qualifying information |
Hardback |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
UMP |
| Language of cataloging |
eng |
| Transcribing agency |
UMP |
| Description conventions |
rda |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
KK.R49 2022 r Thesis |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Mohamed Reza Zalani Mohamed Suffian, |
| Relator term |
author. |
| 245 10 - TITLE STATEMENT |
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| Title |
Plasma spray of nicraly coating on laser surface modified H13 tool steel / |
| Statement of responsibility, etc. |
Mohamed Reza Zalani Mohamed Suffian |
| 264 #1 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Place of production, publication, distribution, manufacture |
Pahang : |
| Name of producer, publisher, distributor, manufacturer |
UMP, |
| Date of production, publication, distribution, manufacture, or copyright notice |
2022 |
| 264 #4 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Date of production, publication, distribution, manufacture, or copyright notice |
© 2022 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
xiv, 124 pages : |
| Other physical details |
Illustration ; |
| Dimensions |
30 cm. + |
| Accompanying material |
1 CD-ROM |
| 336 ## - CONTENT TYPE |
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| Content type term |
text |
| Source |
rdacontent |
| 336 ## - CONTENT TYPE |
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| Content type term |
text |
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rdacontent |
| 337 ## - MEDIA TYPE |
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| Media type term |
unmediated |
| Source |
rdamedia |
| 337 ## - MEDIA TYPE |
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| Media type term |
computer |
| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
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| Carrier type term |
volume |
| Source |
rdacarrier |
| 338 ## - CARRIER TYPE |
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| Carrier type term |
computer disc |
| Source |
rdacarrier |
| 347 ## - DIGITAL FILE CHARACTERISTICS |
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| File type |
text file |
| Encoding format |
PDF |
| Source |
rda |
| 500 ## - GENERAL NOTE |
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| General note |
College of Engineering |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (Doctor of Philosophy) -- Universiti Malaysia Pahang – 2022 |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Includes bibliographical reference |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
This thesis presents experimental study of nickel-based alloy, NiCrAlY coating on laser modified AISI H13 steel using atmospheric plasma spray (APS). AISI H13 steel is often being used as die material in metal forming technology, specifically semi solid metal processing. Repetitive process of incoming high temperature, solidification and rapidly quenched semi solid metal through die, causes erosion and corrosion wear on the die cavity surface. Erosion which was causes by friction and corrosion by chemical reaction mitigate die performance and durability properties. Hence, retaining die properties were crucial to gain optimum semi solid metal processes. This study aims to modify AISI H13 steel substrate surface for enhanced mechanical properties and interfacial bonding with NiCrAlY coating. Mechanical properties of AISI H13 steel surface micro hardness was enhanced from rapid quenching process by pulse laser surface modification. While, interfacial bonding of NiCrAlY coating was enhanced by increasing the percentage of chemical elemental diffusion and the surface roughness asperities for mechanical interlocking. A modified layer of AISI H13 steel with enhanced surface properties was developed using two different laser spot size of 90 µm and 600 µm separately. The mechanical properties and interfacial bonding of NiCrAlY coating on laser surface modified AISI H13 steel substrate were enhanced at different laser parameters. Laser parameters of 90 um spot size used were laser peak power; 0.76 kW and 1.3 kW, pulse rate frequency (PRF); 2500 Hz and 2800 Hz and laser scanning speed; 2.0 mm/s and 6.0 mm/s. While, laser parameters of 600 um spot size used were laser peak power; 1.6 kW and 2.0 kW, pulse rate frequency (PRF); 40 Hz and 60 Hz and laser scanning speed; 14.13 mm/s and 20 mm/s. Prior to NiCrAlY coating, lasered samples being modified by 600 um laser spot size went on sandblasting process. Surface profile such as asperities, valleys depth and peak height and average roughness, Ra also had been analyzed. Asperities at the entire surface profile with low peaks and valleys size promotes wettability of coating particle splats during coating. Elemental analysis showed chemical bonding occurred in coating because of element diffusion. Metastable phase occurred on the laser modified surface inspired atomic diffusion that enhanced coating adhesion. Metastable phase consists of excited energy that promotes atomic diffusion between the laser modified/coating interlayer. Results for coating interfacial toughness obtained by Vickers interfacial indentation test (IIT) were obtained above reference sample toughness measurement which was 2.08 MPa. Interfacial toughness range between 2.02 to 6.54 MPa. For conclusion, interface bonding of NiCrAlY coating is enhanced based from the research objectives. Mechanical interlocking plays an important role for interface bonding of NiCrAlY coating. Surface that contains asperities at whole surface profile, decreasing depth and peaks measurement increased coating adhesion. For atomic bonding, metastable α-Fe phase occurs from laser surface modification assists atomic diffusion in the NiCrAlY coating interlayer. Mechanical interlocking plays major role in the succesful of the NiCrAlY coating adhesion. Hence, NiCrAlY coating on laser modified H13 steel by 600 um laser spot size requires surface post processing using sandblasting. This research findings were important to obtained achievement of coating layer with resistance to erosion and corrosion in the direction of manufacturing sustainability. |
| 610 20 - SUBJECT ADDED ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
College of Engineering |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Universities and colleges |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Thesis |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Thesis |