Pub Date : 1994-07-01DOI: 10.1080/09534962.1994.11819165
P. K. Biswast, R. M. Pillai, P. Rohatgi, E. Dwarakadasa
Many of the drawbacks associated with the production of conventionally cast ingots and castings, such as the presence of pipes, centre-line segregation and columnar grains, can be attributed to the manner and extent of cooling inside the mould cavity and the problems of heat transfer from the centre to the outside of the casting. These result in lowering of the average mechanical properties and the yield of the casting. In the past, the use of external chills to reduce the above defects has had limited effects. This is because the influence of external chills becomes marginal beyond a certain distance. One of the potential methods of overcoming such problems is to employ heat sinks in the form of internal chills. Despite reported work by Russian and Japanese investigators on the use of internal chills, in the form of powder or strip, in iron and steel castings, no detailed information on the use of such chills in aluminium or other non-ferrous alloys is available in the literature.This paper presents deta...
{"title":"The influence of internal chills on the structure and properties of aluminium alloy castings","authors":"P. K. Biswast, R. M. Pillai, P. Rohatgi, E. Dwarakadasa","doi":"10.1080/09534962.1994.11819165","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819165","url":null,"abstract":"Many of the drawbacks associated with the production of conventionally cast ingots and castings, such as the presence of pipes, centre-line segregation and columnar grains, can be attributed to the manner and extent of cooling inside the mould cavity and the problems of heat transfer from the centre to the outside of the casting. These result in lowering of the average mechanical properties and the yield of the casting. In the past, the use of external chills to reduce the above defects has had limited effects. This is because the influence of external chills becomes marginal beyond a certain distance. One of the potential methods of overcoming such problems is to employ heat sinks in the form of internal chills. Despite reported work by Russian and Japanese investigators on the use of internal chills, in the form of powder or strip, in iron and steel castings, no detailed information on the use of such chills in aluminium or other non-ferrous alloys is available in the literature.This paper presents deta...","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73791765","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 : 1994-07-01DOI: 10.1080/09534962.1994.11819169
F. Chiesat, R. Fuoco, J. Gruzleski
{"title":"Porosity distribution in directionally solidified test bars sand cast from a controlled A356 melt","authors":"F. Chiesat, R. Fuoco, J. Gruzleski","doi":"10.1080/09534962.1994.11819169","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819169","url":null,"abstract":"","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85221295","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 : 1994-07-01DOI: 10.1080/09534962.1994.11819170
J. A. Spittle, M. Tadayon
{"title":"Observations on the numerical prediction of the columnar to equiaxed grain transition in castings","authors":"J. A. Spittle, M. Tadayon","doi":"10.1080/09534962.1994.11819170","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819170","url":null,"abstract":"","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89211761","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 : 1994-07-01DOI: 10.1080/09534962.1994.11819167
Ḥ. Bayātī, A. Rimmer, R. Elliott
{"title":"The influence of austenitising temperature on the kinetics and processing window of a low-manganese, compacted-graphite cast iron","authors":"Ḥ. Bayātī, A. Rimmer, R. Elliott","doi":"10.1080/09534962.1994.11819167","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819167","url":null,"abstract":"","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83289225","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 : 1994-07-01DOI: 10.1080/09534962.1994.11819168
M. Hafiz, Toshiro Kobayashi, Nabil Fat-Hallat
In the present investigation, the toughness of A1-8Si casting alloy has been evaluated by an instrumented Charpy impact test machine, using U-notched specimens. In attempting to identify the role of the microstructure in relation to toughness, a number of microstructural parameters, including dendrite spacing (λd), mean free path (MFP) across the dendrites (i.e., edge-to-edge dendrites spacing), in addition to Si particle size, morphology and spacing, are considered. It has been found that the microstructural change has affected the toughness of the alloy under investigation in two ways, namely an increase in the initiation energy required for fracture, and an increase in the propagation energy of fracture. The presence of fine Si particles of low aspect ratio and with a beneficial degree of sphericity has affected the initiation energy as a result of an improvement in the resistance to void initiation. In the case of propagation energy of fracture, the void size and its effect of local strain concentrati...
{"title":"Role of microstructure in relation to the toughness of hypoeutectic Al-Si casting alloy","authors":"M. Hafiz, Toshiro Kobayashi, Nabil Fat-Hallat","doi":"10.1080/09534962.1994.11819168","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819168","url":null,"abstract":"In the present investigation, the toughness of A1-8Si casting alloy has been evaluated by an instrumented Charpy impact test machine, using U-notched specimens. In attempting to identify the role of the microstructure in relation to toughness, a number of microstructural parameters, including dendrite spacing (λd), mean free path (MFP) across the dendrites (i.e., edge-to-edge dendrites spacing), in addition to Si particle size, morphology and spacing, are considered. It has been found that the microstructural change has affected the toughness of the alloy under investigation in two ways, namely an increase in the initiation energy required for fracture, and an increase in the propagation energy of fracture. The presence of fine Si particles of low aspect ratio and with a beneficial degree of sphericity has affected the initiation energy as a result of an improvement in the resistance to void initiation. In the case of propagation energy of fracture, the void size and its effect of local strain concentrati...","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87941929","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 : 1994-07-01DOI: 10.1080/09534962.1994.11819166
M. Sfantsikopoulos, V. Tsoukalas, C. Webster, M. J. Weiler
{"title":"A symbolic system for the language independent classification of aluminium pressure-diecasting defects","authors":"M. Sfantsikopoulos, V. Tsoukalas, C. Webster, M. J. Weiler","doi":"10.1080/09534962.1994.11819166","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819166","url":null,"abstract":"","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88636539","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 : 1994-03-01DOI: 10.1080/09534962.1994.11819163
J. A. Spittle, M. Almeshhedani, Steve Brown
Recently, there has been considerable interest in the possibility of employing criteria functions as a means of predicting the presence and scale of microstructural features in castings using a num...
最近，人们对使用标准函数作为预测铸件中微观结构特征的存在和规模的方法的可能性非常感兴趣。
{"title":"The Niyama function and its proposed application to microporosity prediction","authors":"J. A. Spittle, M. Almeshhedani, Steve Brown","doi":"10.1080/09534962.1994.11819163","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819163","url":null,"abstract":"Recently, there has been considerable interest in the possibility of employing criteria functions as a means of predicting the presence and scale of microstructural features in castings using a num...","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75212082","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 : 1994-03-01DOI: 10.1080/09534962.1994.11819164
S. Hiratsuka, E. Niyama, H. Horie, T. Kowata, M. Nakamura
{"title":"Fluidity and solidification microstructures of flake graphite cast iron in thin sections","authors":"S. Hiratsuka, E. Niyama, H. Horie, T. Kowata, M. Nakamura","doi":"10.1080/09534962.1994.11819164","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819164","url":null,"abstract":"","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85597983","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 : 1994-03-01DOI: 10.1080/09534962.1994.11819160
Z. F. Zhou, T. F. Wang, G. Cai
A single-roll thin-strip casting process has been described and the effect of operating parameters on the strip quality experimentally studied concerning mainly casting speed and nozzle location an...
{"title":"A single-roll thin-strip casting process","authors":"Z. F. Zhou, T. F. Wang, G. Cai","doi":"10.1080/09534962.1994.11819160","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819160","url":null,"abstract":"A single-roll thin-strip casting process has been described and the effect of operating parameters on the strip quality experimentally studied concerning mainly casting speed and nozzle location an...","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84641415","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 : 1994-03-01DOI: 10.1080/09534962.1994.11819159
Ḥ. Bayātī, A. Rimmer, R. Elliott
{"title":"The austempering kinetics and processing window in an austempered, low-manganese compacted-graphite cast iron","authors":"Ḥ. Bayātī, A. Rimmer, R. Elliott","doi":"10.1080/09534962.1994.11819159","DOIUrl":"https://doi.org/10.1080/09534962.1994.11819159","url":null,"abstract":"","PeriodicalId":9691,"journal":{"name":"Cast Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90890217","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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