CAJ | 학술논문

20多年以来, 用小型试件的小冲杆实验技术来测量在役设备材料的各种力学参数已经取得了很大进展. 小冲杆实验的试样虽然还没有标准, 但一般均采用直径为3～10mm,厚度为0.1～0.5mm的圆片试样.这个方法已经用来确定材料的弹性模量、屈服强度、塑性性能、抗拉强度、断裂形态转变温度、断裂韧性、蠕变性能以及表示塑性硬化和韧性损伤的微观力学参数和黏塑性性能等各种力学性能.该方法兼具取样方便和几乎无损的优点,非常适用于那些无法取出传统试样或取样不经济的场合,因此引起科技界和工业界的关注.本文综述了小冲杆试验的测量技术及从测量数据来确定材料断裂形态转变温度、断裂韧性和主曲线的移动温度的各种计算方法研究进展.
20다년이래, 용소형시건적소충간실험기술래측량재역설비재료적각충역학삼수이경취득료흔대진전. 소충간실험적시양수연환몰유표준, 단일반균채용직경위3～10mm,후도위0.1～0.5mm적원편시양.저개방법이경용래학정재료적탄성모량、굴복강도、소성성능、항랍강도、단렬형태전변온도、단렬인성、연변성능이급표시소성경화화인성손상적미관역학삼수화점소성성능등각충역학성능.해방법겸구취양방편화궤호무손적우점,비상괄용우나사무법취출전통시양혹취양불경제적장합,인차인기과기계화공업계적관주.본문종술료소충간시험적측량기술급종측량수거래학정재료단렬형태전변온도、단렬인성화주곡선적이동온도적각충계산방법연구진전.
Over the past 20 years, small punch experimental technology for testing miniaturized specimens has been developed to evaluate the mechanical properties of materials in service. Although there is no standard for test specimens, but disc specimens with 3～10mm diameter and 0.1～0.5mm thickness are commonly used in practice. It has been used to determinate the elastic modulus, yield strength, plastic properties, tensile strength, ductile-brittle transition temperature, fracture roughness, creep properties, and micro-mechanical material parameters describing plastic hardening and ductile damage and edurance strength so on. It is convenience for sampling and nearly non-destructive, so is very suitable for the situations where conventional sampling is impossible or uneconomic, therefore, attracts attention from academia and industry. An overview of state of the art about empirical and computational methods for determining the ductile-brittle transition temperature, fracture toughness and shift temperature of master curve from measured data of small punch test is presented in this article.