• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effect of preheat temperature and post-process treatment on the microstructure and mechanical properties of stainless steel 410 made via ultrasonic additive manufacturing
【24h】

Effect of preheat temperature and post-process treatment on the microstructure and mechanical properties of stainless steel 410 made via ultrasonic additive manufacturing

机译：预热温度和后处理对超声增材制造不锈钢410的组织和力学性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ultrasonic additive manufacturing (UAM) is a solid-state manufacturing technology for producing near-net shape metallic parts combining additive ultrasonic metal welding and subtractive machining. Even though UAM has been demonstrated to produce robust metal builds in Al-Al, Al-Ti, Al-steel, Cu-Cu, Al-Cu, and other material systems, UAM welding of high strength steels has proven challenging. This study investigates process and post-processing methods to improve UAM steel weld quality and demonstrates the UAM fabrication of stainless steel 410 (SS 410) builds which possess, after post-processing, mechanical properties comparable with bulk material. Unlike UAM fabrication of softer metals, this study shows that increasing the baseplate temperature from 38 degrees C (100 degrees F) to 204 degrees C (400 degrees F) improves interfacial strength and structural homogeneity of the UAM steel samples. Further improvement in strength is achieved through post-processing. The hot isostatic pressing (HIP) post treatment improves the shear strength of UAM samples to 344 MPa from 154 MPa for as-welded samples. Microstructural analyses with SEM and EBSD show no evidence of body centered cubic (BCC) ferrite to face centered cubic (FCC) austenite transformation taking place during UAM welding of SS 410. The weld quality improvement of UAM steel at higher baseplate temperatures is believed to be caused by the reduction of the yield strength of SS 410 at elevated temperature. HIP treatment is shown to increase the overall hardness of UAM SS 410 from 204 +/- 7 HV to 240 +/- 16 HV due to the formation of local pockets of martensite. Nanohardness tests show that the top of layer n is harder than the bottom of layer n+1 due to grain boundary strengthening.
机译：超声波增材制造（UAM）是一种固态制造技术，用于结合增材超声波金属焊接和减法加工来生产接近最终形状的金属零件。尽管已证明UAM可在Al-Al，Al-Ti，Al-钢，Cu-Cu，Al-Cu和其他材料系统中产生坚固的金属结构，但事实证明，高强度钢的UAM焊接具有挑战性。这项研究调查了改善UAM钢焊缝质量的工艺和后处理方法，并证明了UAM制造的410不锈钢（SS 410）构件在后处理后具有可与散装材料媲美的机械性能。与UAM制作软金属不同，该研究表明，将底板温度从38摄氏度（100华氏度）提高到204摄氏度（400华氏度）可以改善UAM钢样品的界面强度和结构均匀性。通过后处理可以进一步提高强度。热等静压（HIP）后处理将UAM样品的剪切强度从焊接后的154 MPa提高到344 MPa。用SEM和EBSD进行的显微组织分析表明，没有证据表明在SS 410的UAM焊接过程中发生了体心立方（BCC）铁素体到面心立方（FCC）奥氏体的转变。在较高的底板温度下，UAM钢的焊接质量改善被认为是这是由于高温下SS 410的屈服强度降低引起的。由于形成了马氏体局部凹坑，HIP处理表明可将UAM SS 410的整体硬度从204 +/- 7 HV增加到240 +/- 16 HV。纳米硬度测试表明，由于晶界强化，n层的顶部比n + 1层的底部硬。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号