高铍铸造铍铝合金延伸率的评价指标
|
摘要
对高铍铸造铍铝合金的显微组织以及拉伸试验断裂过程进行了分析,并结合GB/T228.1-2010以及ASTM E8-2004的要求与定义探讨了用于准确评价高铍铸造铍铝合金延伸率的指标。结果表明:由于高铍铸造铍铝合金实际上是一种以铝为基体的复合材料,拉伸试验后试样不一定完全断开,所以对其延伸率指标进行评价时,不宜采用试样断后对接的方法;最好用引伸计采集精准应变,选取合适的断裂点判据,以便测得有效的延伸率指标。
The microstructure and the tensile fracture process of a high beryllium casting Be-Al alloy were analyzed.And combining the requirement and definition of GB/T 228.1-2010 and ASTM E8-2004,the accurate evaluation indexes for elongation of high beryllium casting Be-Al alloy were researched.The results show that high beryllium casting Be-Al alloy was a kind of composite material with aluminum as the matrix,and after tensile test the samples might not be completely broken,so it was not suitable to evaluate the elongation index of it by the method of docking the fractured samples.It was better to collect accurate strain by extensometer and chose the right breaking point in order to obtain the effective elongation index.
The microstructure and the tensile fracture process of a high beryllium casting Be-Al alloy were analyzed.And combining the requirement and definition of GB/T 228.1-2010 and ASTM E8-2004,the accurate evaluation indexes for elongation of high beryllium casting Be-Al alloy were researched.The results show that high beryllium casting Be-Al alloy was a kind of composite material with aluminum as the matrix,and after tensile test the samples might not be completely broken,so it was not suitable to evaluate the elongation index of it by the method of docking the fractured samples.It was better to collect accurate strain by extensometer and chose the right breaking point in order to obtain the effective elongation index.
引文
[1]许德美.多晶铍的室温脆性研究[D].沈阳:东北大学,2015:117.
[2]张秋平,张永寿.Be-Al合金的机械性能[J].飞航导弹,2002(12):57-61.
[3]马玲,赵双群.铍铝合金的研究进展[J].材料导报,2005,19(增刊2):431-433.
[4]刘孝宁,马世光.铍铝合金的研究与应用[J].稀有金属,2003,27(1):62-65.
[5]王战宏,王莉,吴艳青,等.铍铝合金室温拉伸及原位疲劳失效分析[J].粉末冶金技术,2007,25(3):163-166.
[6]张健康,浮国运,栾新刚,等.铍铝合金显微组织的评定方法[J].理化检验-物理分册,2015,51(5):320-322.
[7]焦旗,马玲,冯婷,等.银、钴、锗对铍铝合金组织及性能的影响[J].特种铸造及有色合金,2010,30(10):973-976.
[8]许德美,李峰,王战宏,等.粉末热等静压和铸造Be-Al合金的室温拉伸断裂机理[J].中国有色金属学报,2009,19(12):2128-2135.
[9]GB/T 228.1-2010金属材料拉伸试验第1部分:室温试验方法[S].
[10]ASTM E8-2004 Standard test methods for tension testing of metallic materials[S].
[11]王滨.ASTM金属材料拉伸试验方法介绍[J].理化检验-物理分册,2004,40(10):528-532.
[2]张秋平,张永寿.Be-Al合金的机械性能[J].飞航导弹,2002(12):57-61.
[3]马玲,赵双群.铍铝合金的研究进展[J].材料导报,2005,19(增刊2):431-433.
[4]刘孝宁,马世光.铍铝合金的研究与应用[J].稀有金属,2003,27(1):62-65.
[5]王战宏,王莉,吴艳青,等.铍铝合金室温拉伸及原位疲劳失效分析[J].粉末冶金技术,2007,25(3):163-166.
[6]张健康,浮国运,栾新刚,等.铍铝合金显微组织的评定方法[J].理化检验-物理分册,2015,51(5):320-322.
[7]焦旗,马玲,冯婷,等.银、钴、锗对铍铝合金组织及性能的影响[J].特种铸造及有色合金,2010,30(10):973-976.
[8]许德美,李峰,王战宏,等.粉末热等静压和铸造Be-Al合金的室温拉伸断裂机理[J].中国有色金属学报,2009,19(12):2128-2135.
[9]GB/T 228.1-2010金属材料拉伸试验第1部分:室温试验方法[S].
[10]ASTM E8-2004 Standard test methods for tension testing of metallic materials[S].
[11]王滨.ASTM金属材料拉伸试验方法介绍[J].理化检验-物理分册,2004,40(10):528-532.