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A direct resistance measurement method using two po int probes has been used to measure the electrical resistance of ductile graphite cast iron produced at different thickness sections and over a wide range of temperatures. The thermal conductivi ty of this type of cast iron was estimated using the WiwedemenFranze –Loranze Law. It was found t hat smaller section thickness has lower thermal conductivity than medium and larger thickne sses. This is due to the formation of compacted and degenerated ductile cast iron at high er section thicknesses. امدنع يوركلا رھزلا ديدحلا ندعمل يرارحلا ليصوتلا باسحل سنارول زنارف ملاعلا هقيرط قيبطت مت ثحبلا اذھ ىف ه#يلاع ةرار#ح تا#جرد دنع و ةفلتخم كامسا تاذ عطاقم ىف جتني . ن#م هر#شابم ة#يئابرھكلا ة#مواقملا سا#يق م#ت ث#يح ندعملا نم تانيعل نيتطقن دنع رشابملا لاصت4ا ل5خ ، #جوو جت#ني د#نع دادز#ي ند#عملا اذ#ھل يرار#حلا لي#صوتلا نأ د ي#ف رھزلا ديدحلا نم عونلا اذھ جتني امدنع يرارحلا ليصوتلا لقيو ةكيمسلا عطاقملا يف رھزلا ديدحلا نم عونلا اذھ ي#ف رجش#تم يور#ك رھز ديدحو طوغضم رھز ديدح نوكت نع جتان كلذ يف ببسلا و ةريغصلا و ةطسوتملا عطاقملا ملا هذھ عطاق .

erj. engineering research journal

APPLICATION OF WIWEDEMEN- FRANZE –LORANZE LAW TO INVESTIGATE THE EFFECT OF TEMPERATURE AND SECTION THICKNESS ON THE THERMAL CONDUCTIVITY OF DUCTILE GRAPHITE CAST IRON