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1、课后学习网网（分享是快乐的！）http://www.khxxw.com工程材料思考题参考答案第一章金属的晶体结构与结晶1．解释下列名词点缺陷，线缺陷，面缺陷，亚晶粒，亚晶界，刃型位错，单晶体，多晶体，过冷度，自发形核，非自发形核，变质处理，变质剂。答：点缺陷：原子排列不规则的区域在空间三个方向尺寸都很小，主要指空位间隙原子、置换原子等。线缺陷：原子排列的不规则区域在空间一个方向上的尺寸很大，而在其余两个方向上的尺寸很小。如位错。面缺陷：原子排列不规则的区域在空间两个方向上的尺寸很大，而另一方向上的尺寸很小。如晶界和亚晶界。亚晶粒：在多晶体的每一个晶粒内，晶格位向也并非完全一致，而是存在着许多尺
2、寸很小、位向差很小的小晶块，它们相互镶嵌而成晶粒，称亚晶粒。亚晶界：两相邻亚晶粒间的边界称为亚晶界。刃型位错：位错可认为是晶格中一部分晶体相对于另一部分晶体的局部滑移而造成。滑移部分与未滑移部分的交界线即为位错线。如果相对滑移的结果上半部分多出一半原子面，多余半原子面的边缘好像插入晶体中的一把刀的刃口，故称“刃型位错”。riskmanagerswithtwoaccountmanagertodealwiththeabovekey.SectionIofchapterIIIriskmanagementrequirementspre-loaninvestigationpre-loaninvestiga
3、tionshoulddoublehandle.Pre-loaninvestigationdominatedbyfieldinvestigationsontheground,whileutilizingcreditenquiries,telephoneenquiries,bankinformationsystemquery-relatedpersonnel,andsoon.InterviewsystemofBank'sstrictapplicationofthesystemofpersonalcreditbusinessinterview.Investigatorsshouldworkwithb
4、orrowers,totherepaymentortheguarantorcreditbusiness,suchaspartiesandthespouseofconfirmedactssuchasloans,guarantees,verificationofitsauthenticityanditsrightsandobligationsinthecreditbusiness,retainthesesignedtranscriptoftheinterview,fromthefirststeptopreventfalseloansandotherbusinessrisks.Investigato
5、rshouldretaintheborrowersignapersonalloanapplication,loanapplicationsshouldbeclearlytheamount,purpose,durationandotherinformation.Investigatorsshouldfollowthepracticeforinformationcollectionandverificationofdataauthenticityitcarefully,andkeepcopies,photocopiesmustbecheckedagainsttheoriginalagreement
6、,effectivelypreventingborrowersusingfalseinformationtoapplyforcredit.Incomeandoccupation,andotherkeyinformationtoverifyauthenticityinvestigatorsshouldcarefullyverifyingtheborrower'sincome.Toincomeasthemainsourceofrepayment,subjecttoproofofincomeisrequired,butshouldalsoauditpayrollflowingwater,andsta
7、ffthanthepeerconfirmedtheauthenticityofthesametype;operatingincomeasthemainsourceofrepayment,andshouldrefertotheworkingcapitalloansrequiredtoverifyrealincomes,accuracy;guardnoabilitytorepayorguarantee
