Quantification of fatigue damage accumulation using non-linear ultrasound measurements
This article attempts to relate ultrasonic second harmonic generation to dislocation structures in fatigued materials. By focusing on the fact that asymmetric dislocation motion is required to generate the second harmonic, a theoretical derivation of the non-linearity parameter (ratio of the amplitu...
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| Veröffentlicht in: | International journal of fatigue 2007-09, Vol.29 (9), p.2032-2039 |
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| container_title | International journal of fatigue |
| container_volume | 29 |
| creator | Oruganti, Ramkumar K. Sivaramanivas, Ramaswamy Karthik, T.N. Kommareddy, Vamshi Ramadurai, Bala Ganesan, Baskaran Nieters, Edward J. Gigliotti, Michael F. Keller, Michael E. Shyamsunder, M.T. |
| description | This article attempts to relate ultrasonic second harmonic generation to dislocation structures in fatigued materials. By focusing on the fact that asymmetric dislocation motion is required to generate the second harmonic, a theoretical derivation of the non-linearity parameter (ratio of the amplitude of second harmonic to square of the amplitude of the fundamental) from dislocation pile-ups is presented. In order to verify the theory, harmonic generation was measured along a failed fatigue sample of DA718, a nickel base superalloy that exhibits planar slip, and consequently dislocation pile-ups. TEM studies along the length of the failed fatigue sample revealed a banded dislocation structure, composed of pile-ups near the fracture zone and a sparse dislocation network closer to the grip region. The non-linearity parameter was found to increase by between 90% and 140% from the grip region to the fracture zone and this correlated well with the calculations based on theoretical expressions derived here. |
| doi_str_mv | 10.1016/j.ijfatigue.2007.01.026 |
| format | Article |
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By focusing on the fact that asymmetric dislocation motion is required to generate the second harmonic, a theoretical derivation of the non-linearity parameter (ratio of the amplitude of second harmonic to square of the amplitude of the fundamental) from dislocation pile-ups is presented. In order to verify the theory, harmonic generation was measured along a failed fatigue sample of DA718, a nickel base superalloy that exhibits planar slip, and consequently dislocation pile-ups. TEM studies along the length of the failed fatigue sample revealed a banded dislocation structure, composed of pile-ups near the fracture zone and a sparse dislocation network closer to the grip region. The non-linearity parameter was found to increase by between 90% and 140% from the grip region to the fracture zone and this correlated well with the calculations based on theoretical expressions derived here.</description><identifier>ISSN: 0142-1123</identifier><identifier>EISSN: 1879-3452</identifier><identifier>DOI: 10.1016/j.ijfatigue.2007.01.026</identifier><identifier>CODEN: IJFADB</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Applied sciences ; Dislocations ; Exact sciences and technology ; Fatigue ; Low-cycle fatigue ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; Metals. Metallurgy ; Non-linear ultrasound</subject><ispartof>International journal of fatigue, 2007-09, Vol.29 (9), p.2032-2039</ispartof><rights>2007 Elsevier Ltd</rights><rights>2007 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c442t-d5057c13c4def237c13b78f298be2279a26b8d27da48a6445cfa41c0ccfc4a5f3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0142112307000412$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>309,310,314,776,780,785,786,3537,23909,23910,25118,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=19069128$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Oruganti, Ramkumar K.</creatorcontrib><creatorcontrib>Sivaramanivas, Ramaswamy</creatorcontrib><creatorcontrib>Karthik, T.N.</creatorcontrib><creatorcontrib>Kommareddy, Vamshi</creatorcontrib><creatorcontrib>Ramadurai, Bala</creatorcontrib><creatorcontrib>Ganesan, Baskaran</creatorcontrib><creatorcontrib>Nieters, Edward J.</creatorcontrib><creatorcontrib>Gigliotti, Michael F.</creatorcontrib><creatorcontrib>Keller, Michael E.</creatorcontrib><creatorcontrib>Shyamsunder, M.T.</creatorcontrib><title>Quantification of fatigue damage accumulation using non-linear ultrasound measurements</title><title>International journal of fatigue</title><description>This article attempts to relate ultrasonic second harmonic generation to dislocation structures in fatigued materials. By focusing on the fact that asymmetric dislocation motion is required to generate the second harmonic, a theoretical derivation of the non-linearity parameter (ratio of the amplitude of second harmonic to square of the amplitude of the fundamental) from dislocation pile-ups is presented. In order to verify the theory, harmonic generation was measured along a failed fatigue sample of DA718, a nickel base superalloy that exhibits planar slip, and consequently dislocation pile-ups. TEM studies along the length of the failed fatigue sample revealed a banded dislocation structure, composed of pile-ups near the fracture zone and a sparse dislocation network closer to the grip region. The non-linearity parameter was found to increase by between 90% and 140% from the grip region to the fracture zone and this correlated well with the calculations based on theoretical expressions derived here.</description><subject>Applied sciences</subject><subject>Dislocations</subject><subject>Exact sciences and technology</subject><subject>Fatigue</subject><subject>Low-cycle fatigue</subject><subject>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</subject><subject>Metals. Metallurgy</subject><subject>Non-linear ultrasound</subject><issn>0142-1123</issn><issn>1879-3452</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqFkE1r3DAQhkVJoJu0v6G-NDc7I1m27GMIaRsIhECaq5gdjxYttpxKViD_vl52aY85zcC8H8wjxDcJlQTZXu8rv3e4-F3mSgGYCmQFqv0kNrIzfVnrRp2JDUitSilV_VlcpLQHgB5MsxEvTxnD4p2nNWIOxeyKU1gx4IQ7LpAoT3k8nnPyYVeEOZSjD4yxyOMSMc05DMXEmHLkicOSvohzh2Pir6d5KX7_uHu-_VU-PP68v715KElrtZRDA40hWZMe2Kn6sG5N51TfbVkp06Nqt92gzIC6w1brhhxqSUDkSGPj6ktxdcx9jfOfzGmxk0_E44iB55xsDVJ10sAqNEchxTmlyM6-Rj9hfLcS7IGj3dt_HO2BowVpV46r8_upAhPh6CIG8um_vYe2X0tW3c1Rx-u_b56jTeQ5EA8-Mi12mP2HXX8BYNWPjg</recordid><startdate>20070901</startdate><enddate>20070901</enddate><creator>Oruganti, Ramkumar K.</creator><creator>Sivaramanivas, Ramaswamy</creator><creator>Karthik, T.N.</creator><creator>Kommareddy, Vamshi</creator><creator>Ramadurai, Bala</creator><creator>Ganesan, Baskaran</creator><creator>Nieters, Edward J.</creator><creator>Gigliotti, Michael F.</creator><creator>Keller, Michael E.</creator><creator>Shyamsunder, M.T.</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20070901</creationdate><title>Quantification of fatigue damage accumulation using non-linear ultrasound measurements</title><author>Oruganti, Ramkumar K. ; Sivaramanivas, Ramaswamy ; Karthik, T.N. ; Kommareddy, Vamshi ; Ramadurai, Bala ; Ganesan, Baskaran ; Nieters, Edward J. ; Gigliotti, Michael F. ; Keller, Michael E. ; Shyamsunder, M.T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c442t-d5057c13c4def237c13b78f298be2279a26b8d27da48a6445cfa41c0ccfc4a5f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Applied sciences</topic><topic>Dislocations</topic><topic>Exact sciences and technology</topic><topic>Fatigue</topic><topic>Low-cycle fatigue</topic><topic>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</topic><topic>Metals. Metallurgy</topic><topic>Non-linear ultrasound</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Oruganti, Ramkumar K.</creatorcontrib><creatorcontrib>Sivaramanivas, Ramaswamy</creatorcontrib><creatorcontrib>Karthik, T.N.</creatorcontrib><creatorcontrib>Kommareddy, Vamshi</creatorcontrib><creatorcontrib>Ramadurai, Bala</creatorcontrib><creatorcontrib>Ganesan, Baskaran</creatorcontrib><creatorcontrib>Nieters, Edward J.</creatorcontrib><creatorcontrib>Gigliotti, Michael F.</creatorcontrib><creatorcontrib>Keller, Michael E.</creatorcontrib><creatorcontrib>Shyamsunder, M.T.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>International journal of fatigue</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Oruganti, Ramkumar K.</au><au>Sivaramanivas, Ramaswamy</au><au>Karthik, T.N.</au><au>Kommareddy, Vamshi</au><au>Ramadurai, Bala</au><au>Ganesan, Baskaran</au><au>Nieters, Edward J.</au><au>Gigliotti, Michael F.</au><au>Keller, Michael E.</au><au>Shyamsunder, M.T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantification of fatigue damage accumulation using non-linear ultrasound measurements</atitle><jtitle>International journal of fatigue</jtitle><date>2007-09-01</date><risdate>2007</risdate><volume>29</volume><issue>9</issue><spage>2032</spage><epage>2039</epage><pages>2032-2039</pages><issn>0142-1123</issn><eissn>1879-3452</eissn><coden>IJFADB</coden><abstract>This article attempts to relate ultrasonic second harmonic generation to dislocation structures in fatigued materials. By focusing on the fact that asymmetric dislocation motion is required to generate the second harmonic, a theoretical derivation of the non-linearity parameter (ratio of the amplitude of second harmonic to square of the amplitude of the fundamental) from dislocation pile-ups is presented. In order to verify the theory, harmonic generation was measured along a failed fatigue sample of DA718, a nickel base superalloy that exhibits planar slip, and consequently dislocation pile-ups. TEM studies along the length of the failed fatigue sample revealed a banded dislocation structure, composed of pile-ups near the fracture zone and a sparse dislocation network closer to the grip region. The non-linearity parameter was found to increase by between 90% and 140% from the grip region to the fracture zone and this correlated well with the calculations based on theoretical expressions derived here.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ijfatigue.2007.01.026</doi><tpages>8</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Dislocations Exact sciences and technology Fatigue Low-cycle fatigue Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy Non-linear ultrasound |
| title | Quantification of fatigue damage accumulation using non-linear ultrasound measurements |
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