Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90352-9
Shuming Sun, Jialing Gu, Nanping Chen
From this study, it is clear that the dislocation content increased and then resulted in the formation of subcells in the ferrite, at the ferrite-martensite interface, also the grain boundaries in ferrite widened, and cracks initiated along the interface and lath boundaries of the dual-phase steel if the charging current exceeded a critical value. These sub-structure changes in charged hydrogen dual-phase steel are similar to those caused by a small amount of plastic deformation. These structural changes may be a reason that dual-phase steels are susceptible to hydrogen embrittlement.
{"title":"The influence of hydrogen on the sub-structure of the martensite and ferrite dual-phase steel","authors":"Shuming Sun, Jialing Gu, Nanping Chen","doi":"10.1016/0036-9748(89)90352-9","DOIUrl":"10.1016/0036-9748(89)90352-9","url":null,"abstract":"<div><p>From this study, it is clear that the dislocation content increased and then resulted in the formation of subcells in the ferrite, at the ferrite-martensite interface, also the grain boundaries in ferrite widened, and cracks initiated along the interface and lath boundaries of the dual-phase steel if the charging current exceeded a critical value. These sub-structure changes in charged hydrogen dual-phase steel are similar to those caused by a small amount of plastic deformation. These structural changes may be a reason that dual-phase steels are susceptible to hydrogen embrittlement.</p></div>","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1735-1737"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90352-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88230159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90359-1
H. Trinkaus
{"title":"The effect of internal pressure on the coarsening of inert gas bubbles in metals","authors":"H. Trinkaus","doi":"10.1016/0036-9748(89)90359-1","DOIUrl":"https://doi.org/10.1016/0036-9748(89)90359-1","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1773-1778"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90359-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90004639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90338-4
T.R. McNalley , D.J. Michel , A. Salama
{"title":"The Mg-concentration dependence of the strength of A1Mg alloys during glide-controlled deformation","authors":"T.R. McNalley , D.J. Michel , A. Salama","doi":"10.1016/0036-9748(89)90338-4","DOIUrl":"10.1016/0036-9748(89)90338-4","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1657-1662"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90338-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72848226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90351-7
Yu.N. Koval, A.P. Kozlov, G.E. Monastyrski
{"title":"Influence of work hardening caused by martensitic transformation on the shape memory effect in FeNiNb alloys","authors":"Yu.N. Koval, A.P. Kozlov, G.E. Monastyrski","doi":"10.1016/0036-9748(89)90351-7","DOIUrl":"10.1016/0036-9748(89)90351-7","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1731-1734"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90351-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75126549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90359-1
H. Trinkaus
{"title":"The effect of internal pressure on the coarsening of inert gas bubbles in metals","authors":"H. Trinkaus","doi":"10.1016/0036-9748(89)90359-1","DOIUrl":"https://doi.org/10.1016/0036-9748(89)90359-1","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"22 1","pages":"1773-1778"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78796442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90347-5
C.R. Feng, D.J. Michel, C.R. Crowe
The TiAl/Ti3Al interfacial misfit dislocations structures were investigated by TEM in Ti-45Al alloy and Ti-45Al/TiB2 composite. For TiAl with c/a = 1.02, only a single set of misfit dislocation arrays are crystallographically possible; these were observed in Ti-45Al alloy. However, the observation of three sets of misfit dislocation arrays in the Ti-45Al/TiB2 composite suggests that the occupation of octahedral sites in the TiAl structure by excess boron was responsible for a decrease in the c/a ratio leading to an increased fcc character of the TiAl at the TiAl/Ti3Al interface.
{"title":"The effects of boron in TiAl/Ti3Al","authors":"C.R. Feng, D.J. Michel, C.R. Crowe","doi":"10.1016/0036-9748(89)90347-5","DOIUrl":"10.1016/0036-9748(89)90347-5","url":null,"abstract":"<div><p>The TiAl/Ti<sub>3</sub>Al interfacial misfit dislocations structures were investigated by TEM in Ti-45Al alloy and Ti-45Al/TiB<sub>2</sub> composite. For TiAl with c/a = 1.02, only a single set of misfit dislocation arrays are crystallographically possible; these were observed in Ti-45Al alloy. However, the observation of three sets of misfit dislocation arrays in the Ti-45Al/TiB<sub>2</sub> composite suggests that the occupation of octahedral sites in the TiAl structure by excess boron was responsible for a decrease in the c/a ratio leading to an increased fcc character of the TiAl at the TiAl/Ti<sub>3</sub>Al interface.</p></div>","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1707-1711"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90347-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87009052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90349-9
P.D. Funkenbusch , T.H. Courtney
Deformation processed composites are complex materials, and it is unlikely that single strengthening mechanism/model can account for all aspects of their behavior. The work hardening model is consistent with some aspects of microstructural evolution and can be used to predict composite strengths as they depend on interphase spacing, phase volume fraction and deformation strain. In addition, the model predicts other important qualitative aspects of DPCM behavior. The work hardening model, however, can not be relied on to provide a detailed picture of dislocation substructure.
Recent attempts to model DPCM strengths solely in terms of interphase barrier strengthening appear implausible. This is a consequence of disregarding substructural development and the importance of substructure in determining composite strengths. Nor is such a mechanism able to explain many other aspects of DPCM behavior. The interphase barrier mechanism is most plausible when processing produces a composite without strong substructural obstacles.
{"title":"On the role of interphase barrier and substructural strengthening in deformation processed composite materials","authors":"P.D. Funkenbusch , T.H. Courtney","doi":"10.1016/0036-9748(89)90349-9","DOIUrl":"10.1016/0036-9748(89)90349-9","url":null,"abstract":"<div><p>Deformation processed composites are complex materials, and it is unlikely that <span><math><mtext>any</mtext></math></span> single strengthening mechanism/model can account for all aspects of their behavior. The work hardening model is consistent with some aspects of microstructural evolution and can be used to predict composite strengths as they depend on interphase spacing, phase volume fraction and deformation strain. In addition, the model predicts other important qualitative aspects of DPCM behavior. The work hardening model, however, can not be relied on to provide a detailed picture of dislocation substructure.</p><p>Recent attempts to model DPCM strengths solely in terms of interphase barrier strengthening appear implausible. This is a consequence of disregarding substructural development and the importance of substructure in determining composite strengths. Nor is such a mechanism able to explain many other aspects of DPCM behavior. The interphase barrier mechanism is most plausible when processing produces a composite without strong substructural obstacles.</p></div>","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1719-1724"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90349-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84484839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1989-10-01DOI: 10.1016/0036-9748(89)90367-0
C.M. Friend
{"title":"The effect of aluminium content on the martensite phase stabilities in metastable CuAlNi alloys","authors":"C.M. Friend","doi":"10.1016/0036-9748(89)90367-0","DOIUrl":"10.1016/0036-9748(89)90367-0","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1817-1820"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90367-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83889536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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