Journal article 1214 views 146 downloads
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel...
Applied Mathematical Modelling, Volume: 40, Issue: 23-24, Pages: 10342 - 10359
Swansea University Author:
Mark Evans
-
PDF | Accepted Manuscript
Download (1.04MB)
DOI (Published version): 10.1016/j.apm.2016.07.013
Abstract
A modified version of the Wilshire equation was proposed to incorporate specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the analysis of times to failure at high temperatures. A new two stage estimation procedure was proposed for obtaining values for the...
Published in: | Applied Mathematical Modelling |
---|---|
ISSN: | 0307-904X |
Published: |
2016
|
Online Access: |
Check full text
|
URI: | https://cronfa.swan.ac.uk/Record/cronfa29506 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
first_indexed |
2016-08-09T12:53:14Z |
---|---|
last_indexed |
2021-01-07T03:46:11Z |
id |
cronfa29506 |
recordtype |
SURis |
fullrecord |
<?xml version="1.0"?><rfc1807><datestamp>2021-01-06T11:25:29.9139360</datestamp><bib-version>v2</bib-version><id>29506</id><entry>2016-08-09</entry><title>Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades</title><swanseaauthors><author><sid>7720f04c308cf7a1c32312058780d20c</sid><ORCID>0000-0003-2056-2396</ORCID><firstname>Mark</firstname><surname>Evans</surname><name>Mark Evans</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2016-08-09</date><deptcode>MTLS</deptcode><abstract>A modified version of the Wilshire equation was proposed to incorporate specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the analysis of times to failure at high temperatures. A new two stage estimation procedure was proposed for obtaining values for the parameters of this modified Wilshire equation. This procedure overcomes the degrees of freedom obstacle present in extending the Wilshire equation is this direction: namely the small number of batches available in many creep data sets with which to investigate a large number of variables defining specific batch characteristics. Just a few batch characteristics were shown to be good predictors of the unknown parameters of the Wilshire equations – namely the P, Mn and Cu content of the batch, the batches hardness and some types of heat treatment. Incorporating these characteristics into the Wilshire equation produced safe life predictions which were more meaningful to specific batches of a 12Cr stainless steel alloy in that the median predictions were more representative of a particular batch data and the 0.5 - 99.5 percentile bands were much narrower and so the lower bound provided a more economically feasible safe life. The modification should allow for the more reliable safe life determination of specific batches actually being used by, for example, power generating companies.</abstract><type>Journal Article</type><journal>Applied Mathematical Modelling</journal><volume>40</volume><journalNumber>23-24</journalNumber><paginationStart>10342</paginationStart><paginationEnd>10359</paginationEnd><publisher/><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>0307-904X</issnPrint><issnElectronic/><keywords/><publishedDay>31</publishedDay><publishedMonth>12</publishedMonth><publishedYear>2016</publishedYear><publishedDate>2016-12-31</publishedDate><doi>10.1016/j.apm.2016.07.013</doi><url/><notes/><college>COLLEGE NANME</college><department>Materials Science and Engineering</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>MTLS</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2021-01-06T11:25:29.9139360</lastEdited><Created>2016-08-09T09:47:08.4986184</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Engineering and Applied Sciences - Materials Science and Engineering</level></path><authors><author><firstname>Mark</firstname><surname>Evans</surname><orcid>0000-0003-2056-2396</orcid><order>1</order></author></authors><documents><document><filename>0029506-09082016142226.pdf</filename><originalFilename>evans2016.pdf</originalFilename><uploaded>2016-08-09T14:22:26.8430000</uploaded><type>Output</type><contentLength>1048770</contentLength><contentType>application/pdf</contentType><version>Accepted Manuscript</version><cronfaStatus>true</cronfaStatus><embargoDate>2017-07-27T00:00:00.0000000</embargoDate><copyrightCorrect>true</copyrightCorrect></document></documents><OutputDurs/></rfc1807> |
spelling |
2021-01-06T11:25:29.9139360 v2 29506 2016-08-09 Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades 7720f04c308cf7a1c32312058780d20c 0000-0003-2056-2396 Mark Evans Mark Evans true false 2016-08-09 MTLS A modified version of the Wilshire equation was proposed to incorporate specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the analysis of times to failure at high temperatures. A new two stage estimation procedure was proposed for obtaining values for the parameters of this modified Wilshire equation. This procedure overcomes the degrees of freedom obstacle present in extending the Wilshire equation is this direction: namely the small number of batches available in many creep data sets with which to investigate a large number of variables defining specific batch characteristics. Just a few batch characteristics were shown to be good predictors of the unknown parameters of the Wilshire equations – namely the P, Mn and Cu content of the batch, the batches hardness and some types of heat treatment. Incorporating these characteristics into the Wilshire equation produced safe life predictions which were more meaningful to specific batches of a 12Cr stainless steel alloy in that the median predictions were more representative of a particular batch data and the 0.5 - 99.5 percentile bands were much narrower and so the lower bound provided a more economically feasible safe life. The modification should allow for the more reliable safe life determination of specific batches actually being used by, for example, power generating companies. Journal Article Applied Mathematical Modelling 40 23-24 10342 10359 0307-904X 31 12 2016 2016-12-31 10.1016/j.apm.2016.07.013 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2021-01-06T11:25:29.9139360 2016-08-09T09:47:08.4986184 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Mark Evans 0000-0003-2056-2396 1 0029506-09082016142226.pdf evans2016.pdf 2016-08-09T14:22:26.8430000 Output 1048770 application/pdf Accepted Manuscript true 2017-07-27T00:00:00.0000000 true |
title |
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades |
spellingShingle |
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades Mark Evans |
title_short |
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades |
title_full |
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades |
title_fullStr |
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades |
title_full_unstemmed |
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades |
title_sort |
Incorporating specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the Wilshire equations for safe life prediction in high temperature applications: An application to 12Cr stainless steel bars for turbine blades |
author_id_str_mv |
7720f04c308cf7a1c32312058780d20c |
author_id_fullname_str_mv |
7720f04c308cf7a1c32312058780d20c_***_Mark Evans |
author |
Mark Evans |
author2 |
Mark Evans |
format |
Journal article |
container_title |
Applied Mathematical Modelling |
container_volume |
40 |
container_issue |
23-24 |
container_start_page |
10342 |
publishDate |
2016 |
institution |
Swansea University |
issn |
0307-904X |
doi_str_mv |
10.1016/j.apm.2016.07.013 |
college_str |
Faculty of Science and Engineering |
hierarchytype |
|
hierarchy_top_id |
facultyofscienceandengineering |
hierarchy_top_title |
Faculty of Science and Engineering |
hierarchy_parent_id |
facultyofscienceandengineering |
hierarchy_parent_title |
Faculty of Science and Engineering |
department_str |
School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering |
document_store_str |
1 |
active_str |
0 |
description |
A modified version of the Wilshire equation was proposed to incorporate specific batch characteristics such as chemistry, heat treatment, hardness and grain size into the analysis of times to failure at high temperatures. A new two stage estimation procedure was proposed for obtaining values for the parameters of this modified Wilshire equation. This procedure overcomes the degrees of freedom obstacle present in extending the Wilshire equation is this direction: namely the small number of batches available in many creep data sets with which to investigate a large number of variables defining specific batch characteristics. Just a few batch characteristics were shown to be good predictors of the unknown parameters of the Wilshire equations – namely the P, Mn and Cu content of the batch, the batches hardness and some types of heat treatment. Incorporating these characteristics into the Wilshire equation produced safe life predictions which were more meaningful to specific batches of a 12Cr stainless steel alloy in that the median predictions were more representative of a particular batch data and the 0.5 - 99.5 percentile bands were much narrower and so the lower bound provided a more economically feasible safe life. The modification should allow for the more reliable safe life determination of specific batches actually being used by, for example, power generating companies. |
published_date |
2016-12-31T03:35:53Z |
_version_ |
1763751550218403840 |
score |
11.024221 |