when a ductile material is tested, the reduction in cross-sectional area due to waisting causes an increased stress without an increased force, to ensure that extension proceeds uniformly.
the backlight photography with single sample was used to measure the true stress-strain of the ductile material after necking in tensile test.
本文采用单试样逆光拍照法对延性材料拉伸试验缩颈后的真实应力-应变进行了有效的测量。
the surface morphologies exhibit deformation wear in the middle and micro cutting wear in the sides, which indicate that all the samples exhibit ductile material characteristics in the erosion.
合金丝试样中部为变形磨损,侧面为微切削磨损,表现为典型的韧性材料沖蚀磨损特性。
in turn, this prevents issues concerning corrosion, as the ductile material doesn't crack.
因此,这也避免了一些腐蚀性问题,比如一些可延展的材料不易开裂。
phosphor bronze strip is the most widely used ductile material of copper alloys at present.