Problem with DSC curves

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Main Question or Discussion Point

I have now idea how can I interpret these DSC curves (they are curves of metal alloys with different composition). But the first question is: are they made properly?

 

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http://postimg.org/image/pllubg0vb/

 

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http://s23.postimg.org/6x02vkcxm/1509_as_cast.jpg